Networking concepts you should know when starting in IT | Networking 101

Summary

In this video, the speaker provides a comprehensive overview of essential networking concepts and terms that IT beginners should understand. Covering topics like IP addresses, networking commands, devices, cables, Wi-Fi, access points, and network security, the video emphasizes the importance of networking in IT and business. It includes practical tips on troubleshooting network issues, using tools like SSH and Putty, and understanding devices like routers and access points. The speaker also touches on security basics like firewalls and VPNs, equipping viewers with the fundamental knowledge they need for their IT careers.

Takeaways

• 😀 Networking is crucial in IT and business, and even if you're not a network engineer, understanding the basics is essential.
• 😀 IP addresses are fundamental for devices to connect to the internet. Learn about public, private, static, dynamic, and different classes of IP addresses.
• 😀 Knowing basic networking commands like Ping, ipconfig, and Traceroute is important for troubleshooting network issues.
• 😀 Familiarize yourself with common networking acronyms such as DNS, DHCP, VPN, VoIP, and SSH.
• 😀 SSH (Secure Shell) is a common way to securely access devices remotely; tools like Putty can help you do this.
• 😀 Understanding the types of devices connected to a network, such as access points, printers, and IP phones, is important for IT professionals.
• 😀 Learn the different types of network cables (coax, STP, UTP, and fiber) and their uses, especially UTP and STP for Ethernet.
• 😀 Identifying and using the right network cable category (e.g., CAT5e, CAT6) is crucial for optimal network performance.
• 😀 Familiarity with different network connectors like RJ45 (Ethernet) and RJ11 (phone) is essential when connecting devices.
• 😀 Wi-Fi knowledge is key, including troubleshooting common issues like slow internet, connectivity problems, and lack of internet access.
• 😀 Network security, including understanding firewalls, VPNs, NAT, and WPA for wireless networks, is vital for any IT professional.

Q & A

What is an IP address, and why is it important in networking?

An IP address is a unique identifier assigned to each device connected to a network, ensuring that it can communicate with other devices. It's important because every device needs an IP address to connect to the internet or a local network, and understanding its types (public vs. private, static vs. dynamic) helps in troubleshooting and network management.

What are some common networking commands, and why should IT professionals know them?

Common networking commands include Ping, ipconfig, hostname, nslookup, and Traceroute. These commands are essential for diagnosing and troubleshooting network issues, such as checking connectivity, resolving IP conflicts, or tracing the path of network traffic.

What is SSH, and how does it work in networking?

SSH (Secure Shell) allows secure access to devices over an unsecured network. It encrypts communication between a client and a device, ensuring that sensitive data remains secure. It's commonly used for remote management of devices, especially in network administration.

What are the differences between UTP and STP network cables?

UTP (Unshielded Twisted Pair) cables have no shield and are more susceptible to interference, whereas STP (Shielded Twisted Pair) cables have a foil shield that reduces electromagnetic interference. STP cables are typically used in environments with higher interference risks, but UTP is more common due to its lower cost.

What are the common types of network cables used in the workplace?

The most common network cables are UTP (Unshielded Twisted Pair) and STP (Shielded Twisted Pair) cables, with categories like CAT5e and CAT6 used for Ethernet connections. Fiber optic cables, though more expensive, are used for high-speed, long-distance connections.

How do you identify the category of a network cable?

You can identify the category of a network cable by checking the labeling on the cable itself. It usually indicates the category, such as CAT5e or CAT6, which tells you the cable's specifications for speed and usage.

Why is network security important in IT, and what are some key concepts to learn?

Network security is crucial for protecting devices, data, and user privacy from unauthorized access or cyber threats. Key concepts to learn include firewalls, VPNs (Virtual Private Networks), NAT (Network Address Translation), and WPA (Wi-Fi Protected Access) for securing network connections.

What is an access point, and why should IT professionals be familiar with it?

An access point is a device that allows wireless devices to connect to a wired network via Wi-Fi. IT professionals should be familiar with access points because they are common in business networks, and understanding how to configure and troubleshoot them is essential for maintaining network connectivity.

What are the common Wi-Fi issues that IT professionals should be able to troubleshoot?

Common Wi-Fi issues include inability to connect to Wi-Fi, slow internet connection, and being connected to Wi-Fi but having no internet access. IT professionals should know how to diagnose and fix these issues, often by checking configurations or the status of the Wi-Fi router/access point.

How do network cables differ from fiber optic cables, and when should each be used?

Network cables like UTP and STP are made of copper and are generally used for short-distance connections, whereas fiber optic cables use glass or plastic cores and offer faster speeds over longer distances. Fiber is ideal for high-speed internet and long-distance connections, but it is more expensive than traditional copper cables.