Belajar Dasar Jaringan Komputer dari nol - Part 5/8 | IP and Mac Address

Summary

In this video, the concept of MAC and IP addresses is explained in simple terms. The MAC address, a 48-bit address found on network cards, is unique for each Ethernet device and is used to identify the vendor through the first six hexadecimal digits. The video then introduces the IP address, specifically IPv4, which is used for communication in computer networks. IPv4 has a 32-bit structure, divided into four octets, with various class divisions (A, B, C) that determine the network and host ID allocations. The video provides an introductory explanation, setting the stage for further learning on the topic.

Takeaways

• 😀 MAC address is a layer 2 address found on network cards or Ethernet, unique for each device.
• 😀 A MAC address is 48 bits long, represented by a 16-digit hexadecimal number using digits 0-9 and letters A-F.
• 😀 The first six digits of a MAC address typically indicate the vendor of the network card.
• 😀 Different vendors, such as Qualcomm, Realtek, and Intel, have distinct MAC address identifiers.
• 😀 An IP address, or Internet Protocol address, is used for communication in computer networks.
• 😀 IPv4 addresses are 32 bits long and divided into two parts: Network and Host.
• 😀 IPv4 addresses consist of 4 blocks (octets), each of 8 bits, forming a 32-bit address.
• 😀 IPv4 has class divisions (Class A, B, C) that determine the division of Network and Host.
• 😀 In Class A, the first octet represents the network ID, while the last three octets represent the host ID.
• 😀 In Class B, the first two octets represent the network ID, and the last two octets represent the host ID.
• 😀 In Class C, the first three octets represent the network ID, and the last octet represents the host ID.

Q & A

What is a MAC address?

A MAC (Media Access Control) address is a layer 2 address that is found on the network card or Ethernet interface of a device. It is a unique identifier used to distinguish network devices on a local network.

How long is a MAC address, and what format does it use?

A MAC address is 48 bits long and is represented by a 16-digit hexadecimal number, with digits ranging from 0 to F.

Why are the first six digits of a MAC address significant?

The first six digits of a MAC address typically represent the vendor's identifier. These digits help distinguish different manufacturers of network devices, such as Qualcomm, Realtek, or Intel.

What is the difference between MAC addresses for different vendors?

The difference in MAC addresses between vendors lies in the first six digits, which are assigned to different manufacturers. Each vendor's network devices will have distinct MAC addresses, allowing devices from different manufacturers to be uniquely identified.

What is an IP address?

An IP (Internet Protocol) address is a unique address used for communication within computer networks. It is used to identify devices on the internet or a local network.

What is the structure of an IPv4 address?

An IPv4 address consists of 32 bits, divided into four 8-bit blocks, known as octets. This makes it a 4-octet address, usually written in decimal format separated by dots (e.g., 192.168.1.1).

How are IPv4 addresses divided into network and host parts?

In an IPv4 address, the first portion identifies the network (Network ID), while the second part identifies the host within that network (Host ID). The division depends on the class of the IP address.

What are the classes of IPv4 addresses?

IPv4 addresses are divided into several classes: Class A, Class B, and Class C. These classes differ in how they allocate bits for the Network ID and Host ID. Class A has a larger portion for the host, Class B has a balanced split, and Class C has a smaller host portion.

How is the Class A network division structured in IPv4?

In a Class A IPv4 address, the first octet is used for the Network ID, while the remaining three octets are used for the Host ID. This structure allows for a large number of hosts but fewer networks.

How does the division of the IP address in Class B and Class C differ from Class A?

In Class B, the first two octets are used for the Network ID, while the last two octets are used for the Host ID. In Class C, the first three octets are for the Network ID, and the last octet is for the Host ID. This structure allows for more networks and fewer hosts compared to Class A.