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Showing posts from April, 2025

The standard method of securing TCP/IP networks

TCP/IP is a set of rules that help data move across the internet. But just like people lock their homes to keep them safe, we also need to lock our networks. This is where network security comes in. There are few methods that I would like to go through in my blog post this week. Securing a TCP/IP network is not just one thing. It’s a mix of tools and habits. Firewalls, encryption, VPNs, strong passwords, updates, IDS, and segmentation all work together. When used properly, they keep our data and networks safe. ·    Use of Firewalls: A firewall is like a security guard for your network. It watches all the data that goes in and out. If something looks bad or suspicious, the firewall blocks it. Firewalls can be hardware or software. Most computers and routers today have built-in firewalls. ·    Encryption: Encryption hides your data. When you send data over the internet, it changes into a secret code. Only the person who has the correct key can read it. This protect...

Understanding TCP/IP Applications and Network Naming

The internet works because of a system called TCP/IP. It stands for Transmission Control Protocol and Internet Protocol. These are rules that help computers talk to each other. TCP helps send data correctly. It breaks big data into small packets and makes sure they arrive in the right order. IP gives each computer an address, like a home address, so data knows where to go. Many apps use TCP/IP. For example, web browsers use HTTP, email uses SMTP, and file sharing uses FTP. These apps help us browse websites, send emails, and download files. Network naming is also important. Instead of typing a long IP address (like 192.168.1.1), we use names like google.com . This is easier to remember. The system that changes names to IP addresses is called DNS, which means Domain Name System. When you type a web address, DNS finds the correct IP address. Then, your computer connects to the website. So, TCP/IP and DNS work together. TCP/IP moves the data, and DNS makes sure it goes to the right ...

Exploring more about TCP/IP Networks and Routing

This week, we are learning more about how computer networks work. The focus is on TCP/IP networks. TCP/IP is the set of rules that helps computers talk to each other over the internet or other networks. In the first part of this week’s learning, we look at how TCP/IP networks are designed. We also learn how to study or analyze these networks. This helps us understand how information moves from one computer to another. A good design makes the network fast, safe, and reliable. We also learn about the services and applications that use TCP/IP. These are tools we use every day, like email, websites, and file sharing. All these tools work because of TCP/IP. So, when we send an email or open a website, TCP/IP is doing the hard work in the background. The second part of the week talks about routing. Routing is how data finds its way from one place to another in a network. For example, if you send a message from your phone to a friend’s phone, routing helps that message reach the right pla...

Week 4 Summary

Networking is essential for connecting computers and devices to share information. Several key technologies enable smooth communication in a network. One such technology is TCP/IP, which is the standard protocol used for transmitting data over the internet. It's like the ‘language’ that computers use to communicate with each other. IP Addressing is another crucial concept. Every device in a network needs a unique identifier called an IP address. This allows devices to send and receive data. Sometimes, a network is divided into smaller groups, called subnets, to improve efficiency. Tools like DHCP (Dynamic Host Configuration Protocol) automatically assign IP addresses to devices in a network. Wi-Fi is a technology that lets devices connect to the internet without wires. It works using wireless signals and is based on rules set by the Wi-Fi Alliance. Wi-Fi is very popular because it allows people to connect easily and move freely without being tied down by cables. However, not ...