Top 50 🔥 Network Administrator Interview Questions and Answers

Summary

This video script by Lauren offers an informative guide to the top 50 interview questions for aspiring network administrators. It covers essential IT concepts such as firewalls, VPNs, IP addresses, DNS, and network topologies. The script also delves into the OSI model, network devices like routers and switches, and security topics like DoS attacks and encryption. Additionally, it touches on practical aspects of networking, including troubleshooting, VLANs, and the use of tools like ipconfig and SNMP. The content is designed to help IT professionals prepare for interviews and enhance their understanding of network administration.

Takeaways

• 🔒 A firewall is a security system that prevents unauthorized connections between networks, using either software or hardware implementations.
• 🌐 The difference between HTTP and HTTPS is that HTTP is the standard protocol for transmitting website data over the internet (using TCP port 80), while HTTPS is a secure version that adds encryption and identity verification (using TCP port 443).
• 🛡️ A VPN (Virtual Private Network) provides a secure connection over public networks like the internet, often used by remote workers to access their company's network securely.
• 📍 IP addresses are categorized into public and private addresses; public IPs are routable on the internet, while private IPs are used for internal networks and are not internet-routable.
• 🔄 DNS (Domain Name System) translates domain names into IP addresses, acting as the internet's phone book to locate and access internet resources.
• 🚀 The default route in networking is a configuration that establishes packet forwarding rules when no specific next hop address is available.
• 🔄 DHCP (Dynamic Host Configuration Protocol) automates the assignment of IP addresses to network devices, eliminating the need for manual IP address allocation.
• 💥 A DoS (Denial of Service) attack aims to make network services or the internet unavailable to users, often by overwhelming a web server with traffic.
• 🌐 Network topology refers to the physical and logical layout of a network, including how devices and cables are connected.
• 🛠️ A router is a networking device that manages data flow between connected devices and segments, forwarding data packets based on their destination.
• 📈 The OSI reference model has seven layers, each with specific functions, that define how applications communicate within a network.

Q & A

What is the primary function of a firewall?

A firewall's primary function is to prevent connections between two or more sources by blocking any incoming or outgoing traffic, enhancing network security.

What are the two forms of firewalls and how do they differ?

Firewalls come in two forms: software firewalls, which are programs that provide network security features, and hardware firewalls, which are physical devices that act as a barrier between a trusted network and an untrusted network.

Explain the difference between HTTP and HTTPS protocols.

HTTP (Hypertext Transfer Protocol) is used for transmitting website data and allows for the use of hyperlinks, operating over TCP port 80. HTTPS (HTTP Secure) is a secure version of HTTP that provides identity verification and encryption, using TCP port 443.

What is a VPN and why is it commonly used?

A VPN (Virtual Private Network) is a service that allows users to create a secure connection over public networks like the internet. It is commonly used by remote workers to access their company's network securely from different locations.

What are the two types of IP addresses and what are their purposes?

There are two types of IP addresses: public and private. Public IP addresses are used to access the internet and are routed on the internet, while private IP addresses are used for internal networks and are not routed on the internet, ensuring that traffic cannot be sent to them from the outside.

What is DNS and how does it function?

DNS (Domain Name System) is like the phone book of the internet. It translates domain names, like www.google.com, to IP addresses that browsers can use to load internet resources through the IP protocol.

What is the role of DHCP in a network?

DHCP (Dynamic Host Configuration Protocol) is responsible for automatically assigning IP addresses to network devices, eliminating the need for manual IP address allocation and reducing the potential errors associated with manual configuration.

What is a DoS attack and how is it executed?

A DoS (Denial of Service) attack is an attempt to prevent users from accessing the internet or network services. It is often executed by hackers who overload a web server, making it unable to process legitimate traffic and rendering any website on that server inaccessible.

Explain the concept of network topology.

Network topology refers to the physical and logical layout of a computer network. It defines how computers, devices, and cables are connected to each other, providing a visual representation of the network's structure.

What is a router and how does it manage data flow?

A router is a network device that manages the flow of data to multiple connected devices. It connects two or more network segments and transfers information from the source to the destination. Routers use data packets and routing tables to determine the best path for forwarding data.

What are the seven layers of the OSI reference model and how do they facilitate communication?

The OSI (Open System Interconnection) model has seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application. Each layer provides specific functions that facilitate communication between applications within a network, ensuring that data is transmitted and received correctly.

Outlines

00:00

🔒 Network Security and Protocols

This paragraph introduces the video's focus on top 50 network administrator interview questions, with the first few addressing network security and protocols. It explains what a firewall is and its role in blocking incoming and outgoing traffic, the difference between HTTP and HTTPS protocols, and the use of VPNs for secure remote access. Additionally, it covers the basics of IP addresses, DNS, default routes, DHCP, DoS attacks, and network topology, providing foundational knowledge for IT professionals.

05:00

🌐 Network Models and Technologies

The second paragraph delves into network models and technologies, starting with the OSI reference model and its seven layers, which facilitate communication between network applications. It then discusses the WAN technology suitable for a company's global connectivity needs, the role of proxy servers in network security, the localhost concept, MAC addresses, data encapsulation, and network management through SNMP. The paragraph also touches on the different types of networks based on size, such as LANs, MANs, and WANs, and defines round trip time (RTT) as a key network performance metric.

10:02

🔧 Network Devices and Configuration

This section focuses on network devices and their configuration, explaining the function of a router in managing data flow and the use of IP packets and routing tables. It introduces the concept of data encapsulation in computer networks, the use of IPconfig and ifconfig commands for network interface configuration, and the SNMP for device management. The paragraph also discusses the three types of networks based on size, the importance of the OSI model for protocol layering, and the distinction between MAC addresses and IP addresses in networking.

15:03

🌟 VLANs, Subnets, and Network Management

The fourth paragraph emphasizes VLANs and subnets in network management, detailing how VLANs work at the data link layer to separate network traffic and how subnets are composed of IP addresses and subnet masks. It addresses common HTTP status codes, the smallest IPv4 subnet mask for a network of up to 30 devices, packet filtering as a firewall technique, and the advantages of reverse proxy servers. The paragraph also clarifies the roles of routers and gateways in network traffic regulation and the function of DNS records in mapping domain names to IP addresses.

20:05

📈 Network Performance and Career Development

The final paragraph discusses network performance, with a focus on the number of network IDs in a class C network and the host IDs per network ID. It explores practical scenarios like file sharing between two computers without a hub or router, secure CLI sessions with Cisco switches, and the use of TCP/IP protocol stack for datagram replies. The paragraph concludes with questions about open source project contributions, handling technical mistakes, staying updated with technical news, resolving disagreements in a team, and factors affecting network throughput.

25:06

🚀 Career Development Resources

This closing paragraph provides a brief call to action for viewers to check out more information and resources to help develop their IT careers, suggesting further exploration of topics covered in the video.

Keywords

💡Firewall

A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a set of rules. In the context of the video, it is described as preventing connections between two or more sources and blocking any incoming or outgoing traffic, existing in both software and hardware forms.

💡HTTP and HTTPS Protocols

HTTP (Hypertext Transfer Protocol) and HTTPS (HTTP Secure) are protocols used for transmitting data over the internet. HTTP is the foundation of data communication for the web, operating on TCP port 80, while HTTPS is a secure version of HTTP that uses encryption and operates on TCP port 443, ensuring secure data transactions.

💡VPN (Virtual Private Network)

A VPN is a service that creates a secure and encrypted connection over the internet, allowing users to access the web securely and privately. It is often used by remote workers to connect to their company's network, ensuring that their data is protected from potential eavesdropping or tracking on public networks.

💡IP Addresses

IP addresses are numerical labels assigned to devices connected to a computer network that use the Internet Protocol for communication. They are divided into two types: public and private. Public IP addresses are routable on the internet, while private IP addresses are used for internal networks and are not directly accessible from the internet.

💡DNS (Domain Name System)

DNS is the system that translates more readily memorized domain names to the IP addresses needed for locating and identifying computer services and devices on the internet. It serves as the 'phone book' of the internet, converting human-friendly domain names into machine-readable IP addresses.

💡Default Route

A default route in networking is a routing table entry that tells the network device to forward packets to a specific router or network when the destination IP address is not found in the routing table. It is a fallback mechanism for packets that do not have a specific route defined.

💡DHCP (Dynamic Host Configuration Protocol)

DHCP is a network management protocol used on IP networks where a server dynamically assigns an IP address and other network configuration parameters to each device on the network, so they can communicate with other IP networks. It simplifies the management of IP addresses and reduces the potential for errors in manual allocation.

💡DoS (Denial of Service) Attack

A DoS attack is an attempt to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to the Internet. This is often done by flooding the targeted machine or resource with superfluous requests in an attempt to overload systems and prevent some or all legitimate requests from being fulfilled.

💡Network Topology

Network topology refers to the arrangement of different elements (links, nodes, etc.) in a computer network. It defines the physical and logical layout of the network, showing how devices are connected to each other and how data flows through the network.

💡Router

A router is a networking device that forwards data packets between computer networks. It determines the best path for data to travel, sending data packets from their source to their destination through a network. Routers operate at the network layer (Layer 3) of the OSI model and use routing tables to make decisions about where to forward packets.

💡OSI Model

The OSI model, or Open Systems Interconnection model, is a conceptual framework that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to its underlying internal structure and technology. It is typically illustrated as a seven-layer model, with each layer representing a specific function in the networking process.

Highlights

Firewalls can be either software or hardware and are used to block incoming or outgoing traffic.

HTTP and HTTPS protocols differ in that HTTPS is a secure version of HTTP with identity verification and encryption.

A VPN allows secure connections over public networks, commonly used by remote workers to access their company's network.

IP addresses are divided into public and private groups; public IP addresses route on the internet while private addresses are for local networks.

DNS translates domain names to IP addresses, acting as the internet's phone book.

A default route in IP configuration establishes forwarding rules for packets when no specific next hop address is available.

DHCP automates the assignment of IP addresses to network devices, eliminating manual allocation errors.

DOS attacks aim to prevent users from accessing the internet or network services, often by overloading web servers.

Network topology defines the physical layout of a computer network and how devices are connected.

Routers manage data flow between network segments and are essential for transferring information from source to destination.

The OSI reference model has seven layers and defines how applications communicate within a network.

WAN technology is recommended for a company expanding globally to keep all branches connected 24/7.

A proxy server protects the network by preventing unauthorized access to internal IP addresses.

127.0.0.1, or localhost, is the loopback address used to establish a connection with one's own computer for testing purposes.

MAC addresses are unique, permanent identifiers for network hardware, unlike IP addresses which can change.

Data encapsulation in networking involves adding headers to packets for transmission between computers.

IPConfig and ifconfig commands are used to view and configure network interface settings on Windows and Unix-based systems, respectively.

SNMP is a protocol for managing and exchanging information between network devices like switches, routers, and printers.

Networks can be categorized by size into LANs, MANs, and WANs, each covering different geographic areas and numbers of devices.

Round trip time (RTT) measures the time for a signal to reach its destination and return with an acknowledgement.

Encryption and decryption are processes used to secure data transmission by converting data to unreadable forms and back to original forms.

Transcripts

hi everyone in this video i'm going to

show you

the top 50 network administrator

interview questions and answers

my name is lauren and this channel is

all about showing you how to become

a highly paid itpro fast

let's get started

[Music]

question number one what is a firewall

a firewall prevents connection between

two or more sources

it basically blocks any incoming or

outgoing traffic

firewalls come in two forms software or

hardware firewalls

question number two can you explain the

difference between

http and https protocols

http stands for hypertext transfer

protocol

and is used by the majority of websites

as a means of transmitting website

data and it allows for the use of

hyperlinks

this protocol uses tcp port 80.

https is a secure version of the http

protocol that allows for identity

verification

and low level encryption using tc port

443 question number three

what is a vpn a vpn

is a virtual private network it allows

users to create a secure connection over

public networks such as the internet

vpns are commonly used by mobile workers

in order to access their company's

network from remote locations

question number four what are two types

of ip addresses

and what are they used for all ipv4 ip

addresses can be divided into two

major groups public and private ip

addresses a

public ip address is an ip address that

is used to access the internet

public ip addresses are routed on the

internet

private internal ip addresses are not

routed on the internet and traffic

cannot be sent to them from the internet

they are only supposed to work within

local networks

question number five what is dns

dns stands for domain name system

it is basically the phone book of the

internet

dns translates domain names for example

www.google.com or www.youtube.com

to ip addresses so browsers can load

those

internet resources through the internet

protocol

question number six what is a default

route

a default route is a configuration of

the internet protocol

ip that establishes a forwarding rule

for packets when no specific address of

a next hop host

is available from the routing table or

other routing mechanism

question number seven what is dhcp

and what is it used for dhcp

stands for dynamic host configuration

protocol

and it automatically assigns ip

addresses to network devices

it completely removes the process of

manual allocation of ip addresses

and reduces the errors caused due to

this

question number eight what is dos

dos or denial of service attack is an

attempt to prevent users from being able

to access the internet

or any other network services such

attacks

may come in different forms and are

commonly performed by hackers

one common method of doing this is to

overload a web server so that it can no

longer process legitimate traffic

any website on this web server then

becomes inaccessible

question number nine what is network

topology

network topology is a physical layout of

the computer network

and it defines how the computers devices

cables etc

are connected to each other question

number 10

what is a router a router is a device

that manages the flow of data to

multiple connected devices

it is a network device that connects two

or more network segments

it is used to transfer information from

the source to the destination

in simple words the cable coming from

your isp

goes into a modem which converts input

signals into digital data

usable by a computer a router connects

your modem with other devices to allow

communication between those devices

and the internet routers send

information in the form of data packets

when a router receives a packet it

checks its routing table to determine if

the destination address is for a system

on one of its attached networks or if

the message must be forwarded to another

router

when packets are forwarded from one

router to another router

the receiving router reads the network

address in the packets

and identifies the destination network

and repeats the process

mentioned above question number 11 what

is the osi reference model and how many

layers does it have

the open system interconnection model is

a conceptual reference model that

defines how applications communicate

with each other within a network

it also helps you to understand the

relationship between networks

and defines the process of communication

in a network

it has seven layers question number 12

let's say a company is expanding its

business to other countries

it wants all of its branches to remain

connected to its corporate headquarters

24

7. which network technology do you think

they should use

they should use a wan question number 13

what is a proxy server and how do they

protect the computer network

all devices on a network have an ip

address

knowing the exact ip address of a

network device can leave that device

exposed to an attack proxy servers

prevent unauthorized external users from

accessing those internal ip addresses it

makes the computer network

virtually invisible to external users

question number 14

what is meant by 127.0.0.1

localhost simply put localhost is the

default name

used to establish a connection with your

own computer using the loopback address

network

think of loopback as looping back to

your own machine

the loopback address network has a

default ip address of 127.0.0.1

localhost is used to test applications

on a local computer

when you move to a production or remote

server you will change the references

from localhost to the domain name

you are using the ip address 127.0.0.1

is reserved for loopback or localhost

connections

these networks are usually reserved for

the biggest customers

or some of the original members of the

internet

to identify a connection issue the

initial troubleshooting step

is to ping the server and check if it is

responding

127.0.0.1 and

localhost are the same things in most of

the computer network

question number 15 what is a mac address

a mac address is a unique device address

given to

every network connected hardware unlike

ip addresses

mac addresses are permanent every

network connected device has

one and only one mac address mac stands

for

media access control it is a unique

48-bit serial number

burned into the network circuitry of

every ethernet and wi-fi device

question number 16 what is data

encapsulation

in a computer network to enable data

transmission from one computer to

another

the network devices send messages in the

form of packets

these packets are then added with the ip

header by the relevant osi

reference model layer the data link

layer encapsulates each packet

in a frame that contains the hardware

address of the source

and the destination computer if a

destination computer is on a remote

network

then the frames are routed through a

gateway or router to the destination

computer

question number 17 what is ipconfig

and ifconfig ipconfig stands for

internet protocol configuration

and is a command used on microsoft

windows to view and configure the

network interface

the command ipconfig is useful for

displaying

all tcp ip network information currently

available on a network

it also helps to modify the dhcp

protocol

and dns settings ifconfig

also known as interface configuration is

a command that is used on linux

mac and unix operating systems

it is used to view and configure the tcp

ip network interface parameters from the

command line

question number 18 what is snmp

snmp stands for simple network

management protocol

it is a protocol used for collecting

organizing and exchanging

information between network devices snmp

is widely used in network management for

configuring network devices like

switches

hubs routers printers and servers

question number 19 explain three types

of networks

based on their sizes the size of a

network is defined by the geographic

area it covers and the number of

computers or

network devices within it three types of

networks based on their size

are local area network lan

a network with a minimum of two

computers to a maximum of

thousands of computers within an office

or a building

is known as a lan generally it works for

a single site where people can share

resources like printers data storage

and more metropolitan area network

man it is larger than a land and used to

connect

various lands across small regions a

city

campus of colleges or universities and

the like

which in turn forms a larger network

wide area network

when multiple lands and mans connected

together

form a wan it covers a wider area like a

whole country or

the world question number 20 define

round trip time the time taken for a

signal to reach the destination

and travel back to the sender with the

acknowledgement is termed as

round trip time rtt it is also called

round trip delay rtd question number 21

what is encryption and decryption

encryption is the process of converting

transmitted data into a form that cannot

be read by any device

other than the intended recipient

decryption

is the process of converting back the

encrypted data to its original form

an algorithm called a cipher is used in

the encryption

and decryption process question number

22

mention two important actions performed

by a cisco switch

it uses the source mac addresses of

frames

to build and maintain a mac address

table

it also utilizes the mac address table

to forward frames via the destination

mac address

question number 23 what is a link

a link refers to the connectivity

between two devices

it includes the type of cables and

protocols used for one device to be able

to communicate with the other

question number 24 briefly describe

nat nat stands for network

address translation this is a protocol

that provides a way for

multiple computers on a common network

to share a single connection to the

internet

question number 25 what is rip

rip short for routing information

protocol

is used by routers to send data from one

network to another

it efficiently manages routing data by

broadcasting its routing table to

all other routers within the network it

determines the network distance

in units of hops question number 26

you have one 48 port switch with three

vlans how many collision domains and how

many broadcast domains

three broadcast domains and 48 collision

domains

question number 27 draw a diagram of a

network you've worked on and please

explain it to me this is one of the most

common questions

asked in network administrator

interviews this question will test your

problem solving skills

confidence and work experience check out

lucidchart's networking diagramming tips

and draw

simple and complex networks for practice

a link to lucidchart's website will be

listed in the description area

under this video question number 28

what's the most important thing about

the osi model

the most important factor about the osi

model

is that we can divide up the protocols

into layers

another key factor is that the layers of

the osi model

provide encapsulation and abstraction

question number 29 can you name the

layers of the osi model

physical data link network transport

session presentation and application

question number 30 why can't mac

addresses be used instead of ipv4

or ipv6 for networking unlike

ip addresses mac addresses do not

specify

unique destinations for communication

an ip scheme can be used for a group of

computers to logically distinguish them

as a group via routing tables these

groups can be divided into multiple

levels so that we don't have to keep

track

of every single subnet for instance

17.x.x.x is within the apple network

using an ip scheme helps apple to keep

track of where each of its

thousands of subnets is located and how

to get to them

that's not possible with mac addresses

question number 31

explain the difference between a vlan

and a subnet

do you need a vlan to set up a subnet

vlans work at the data link layer

they refer to the 802.1q standard

using vlans you can give ports a unique

mac address table

separating them from each other vlans

can transport one

or more subnets a vlan is used for

switch partitioning

for example let's assume that you have

an eight port switch

you can use vlans and assign four ports

to one

vlan vlan one and four ports to another

vlan

vlan 2. vlan 1 is totally separated from

vlan 2 traffic

and vice versa on a logical basis you

can get two switches using this

technique

usually if a switch hasn't seen a mac

address

it will flood the traffic to all other

ports

vlans prevent this a subnet is a range

of ip addresses determined by part of an

address

often called network address and a

subnet mask

netmask in simple words a subnet is a

small network

composed by a group of ip addresses

subnets communicate with each other

using routers

question number 32 mention some common

http

status codes 1xx informational responses

communicates transfer protocol level

information

2xx success indicates that the client's

request was accepted successfully

3xx redirection indicates that the

client must take some additional action

in order to complete their request

4xx client-side error

this category of error status codes

points the finger at clients

5xx server-side error the server takes

responsibility for these error status

codes

question number 33 what is the smallest

ipv4 subnet mask

that can be applied to a network

containing up to 30 devices

if you have a standard slash 24 vlan for

users

a 30 for point-to-point links and a

network of up to 30 devices

the smallest ipv4 subnet mask

would be a 27 or a subnet mask

of 255.255.2

question number 34 what is a packet

filter

and how does it work a packet filter is

used as a firewall technique

to control network access by monitoring

outgoing

and incoming packets packets are checked

based on their source

and destination ip addresses protocols

and ports packet filtering is used for

modest

security requirements it is used for

providing isolation of one subnet

from another question number 35

what are the advantages of using a

reverse proxy server

a reverse proxy server will hide the

topology and characteristics of your

servers

it also helps with load balancing

because reverse proxy servers enforce

algorithms like round robin weighted

round robin

and weighted least connections some

other advantages

include ssl offloading and termination

question number 36 can you explain the

difference between

a router and a gateway gateways are used

to regulate

traffic between two dissimilar networks

while routers regulate traffic between

similar networks

let's say you have a windows 2000

network

which uses tcp ip as its primary

protocol

you can connect your network with the

internet using a router

because the internet also uses tcp ip as

its primary protocol

on the other hand you'd use a gateway to

connect a pc network with a 3270

mainframe environment

or to connect a windows nt network with

a netware network

question number 37 what is a default

gateway

a default gateway serves as an access

point

for outbound connections to other

networks

it allows one computer to communicate

with another computer on a different

network

question number 38 can you tell me how

dns records work

dns records tell the dns server which ip

address

each domain is associated with it also

tells how to handle requests

sent to each domain dns records are

basically

mapping files dns records use specific

syntax for its configurations and

functions

some important dns records are soa

start of authority records a address

mapping records

aaa ip version 6 address records

cname canonical name records mx

mail exchanger records ns

name server records ptr

reverse lookup pointer records question

number 39

what is the number of network ids in a

class c

network the number of network id bits in

a class c network is 24.

the number of possible network ids is 2

raised to 21 or 2 million

97 152

the number of host ids per network id is

2

raised to 8 -2 or 254

question number 40 a user in your

company wants to connect two computers

for file sharing

is it possible to do this without using

a hub or

router yes you can use a crossover cable

in this situation

the data transmit pin of one cable is

connected to the data receive pin

of the other cable and vice versa

question number 41

which connection provides a secure cli

session

with encryption to a cisco switch an

ssh connection question number 42

let's say a user opens three browsers on

his pc to access

www.cisco.com to search for ccna

information

the cisco web server sends a datagram as

a reply to the request from one of the

web browsers

can you tell which information is used

by the tcp

ip protocol stack on the user machine to

identify which of the three web browsers

should receive the reply

yes you can use the destination port

number

question number 43 where are cisco ios

debug output messages sent by default

they are sent to the console line

question number 44

let's say a network administrator issues

a copy running dash config startup dash

config command

after making configuration changes on a

cisco switch

what would be the impact of these

commands the new configuration will be

loaded if the switch is restarted

question number 45 do you contribute to

any open source projects

contributing to open source projects

will help you expand your network and

pass

a lot of interviews always say yes

if it's true when asked this question

because the employer would feel that you

are enthusiastic about network

administration

and also willing to share your knowledge

contributing to open source projects

could be very impactful for your career

here are two examples

from reddit users to prove that

those aren't directly related to network

administration but

they are meant to prove a point question

number 46

tell me about the biggest mistake you've

made

the interviewer wants to see if you are

willing to embrace the fact that we're

all fallible

be very open and say that you've made

mistakes but

they have helped you learn a lot and

progress in life

try to mention a technical mistake in

your career instead of a behavioral

mistake

for example you can say that my biggest

mistake was to unplug a server that was

running dhcp

because of this mistake hundreds of

people were not able to access the

network for

almost 50 minutes question number 47

what technical news sources do you check

daily

the interviewer wants to gauge your

passion for networking

just mention your favorite sources a

good example could be the cisco

networking blog

question number 48 tell me about an

instance where your team

client or boss disagreed with you how

did you resolve this situation

this is a very common question asked to

check your attitude towards disagreement

every company wants a person who is open

to disagreements and debate

this question could be approached in a

variety of ways

you can talk about a specific instance

from your career or life

or make up a situation if you have no

experience at all

to prove that you are a good listener

open communicator

and know how to analyze the situation

question number 49

a network administrator is measuring the

transfer of bits across the company

backbone for a

very important application the

administrator notices that the network

throughput is lower than the bandwidth

expected

can you tell which factors could

influence the differences in throughput

some factors responsible could be the

amount of traffic that is currently

crossing the network

the type of traffic that is crossing the

network and the latency that is created

by the number of network devices that

the data is crossing

question number 50 how many hosts are

addressable on a network that has a mask

of 255.255

6. thanks for watching check out the

video on the right

for more information to help you develop

your i.t career

you