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Khaled Harras: Computer Networks

Computer Networks is a "telecommunications network that allows computer to exchange data". (Wikipedia). It uses a data link which is something that connects one location to another to send or receive information. The most famous computer network is the Internet. It supports a huge number. Computer networking could be considered as many branches. For example: electrical engineering, telecommunications, computer science, or computer engineering.

There are four types of communication protocols. Communication protocols are basically bunch of rules to exchange over networks links. HTTP is one of the protocols and it's "World Wide Web protocol" which most of us know. IEE 802 is one of the types of communication protocols and it deals with local area networks and contains a set of standards together. Ethernet (Also known as LAN) uses wired LANS to exchange data over network links. However, Wireless LAN (Commonly known as Wi-FI) uses wireless distribution method to link two or more devices together and it shares many things with the Ethernet.

Another type is the Internet Protocol Suite that is also called as TCP, or more commonly IP (Internet Protocol). It is the foundation of modern networking. Addressing, identification and routing specifications goes for Internet Protocol Version 4. Synchronous Optical Networking (Also known as SONET) and Synchronous Digital Hierarchy (Also known as SDH) are "standardized multiplexing, which means that a method of which analog or digital signals are combined into one signal over a shared medium, protocols that transfer multiple digital bit streams over optical fiber using lasers." (Wikipedia)

There's also Asynchronous Transfer Mode (Also known as ATM) is switching technique for telecommunication networks. It could handle data traffic and real-time, low-latency content. It also has a role which is the connection between the Internet service provider and the user.

LAN has been mentioned above but what is it exactly? LAN stands for Local Area Network which is a networks that connects several devices, like computers, but with a limited geographical area. On the other hand, there's WAN which stands for Wide Area Network and it extends over a large distance. There are also other area networks like Personal Area Network (PAN). PAN is used for communication close to one person. For example, fax machines and telephones. Home Area Network (HAN) uses LAN and it is used for communication between small numbers of devices. VPN is also known for a networks between nodes and carried by open connections not physical wires. VPN stands for Virtual Private Network. It is commonly used for secure communication through the public Internet.

Questions:
1. What are network nodes??
2. Does every computer have its own IP address?
3. Do most networks use LAN?


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REVISED VER:

A Computer Network is “telecommunications network that allows computer to exchange data”. (Wikipedia). It uses a data link which is something that connects one location to another to send or receive information. The most famous computer network is the Internet. It supports a huge number of applications and services. Computer networking could be considered as many different branches, for example: electrical engineering, telecommunications, computer science, or computer engineering.

There are four types of communication protocols. Communication protocols are basically a bunch of rules to exchange over network links. HTTP is one of the protocols and it’s also known as the “World Wide Web protocol” which most of us know. IEE 802 is one of the types of communication protocols and it deals with local area networks(LAN) and contains a set of standards together. The Ethernet (Also known as LAN) uses wired LANS to exchange data over network links. However, Wireless LAN (Commonly known as Wi-FI) uses a wireless distribution method to link two or more devices together and it shares many things with the Ethernet.

Another type of communication protocols is the Internet Protocol Suite that is also called TCP, or more commonly IP (Internet Protocol). It is the foundation of modern networking. Addressing, identification and routing specifications goes for Internet Protocol Version 4. Internet Protocol Version 6 is used for a bigger addressing capability. Synchronous Optical Networking (Also known as SONET) and Synchronous Digital Hierarchy (Also known as SDH) are “standardized multiplexing protocols that transfer multiple digital bit streams over optical fiber using lasers.” Multiplexing is a method in which analog or digital signals are combined into one signal over a shared medium. (Wikipedia)

There’s also Asynchronous Transfer Mode (Also known as ATM) which is a switching technique for telecommunication networks. It can handle data traffic and real-time, low-latency content. It also has a role as the connection between the Internet service provider and the user.

LAN has been mentioned above but what is it exactly? LAN stands for Local Area Network which is a network that connects several devices, like computers, but with a limited geographical area. On the other hand, there’s WAN which stands for Wide Area Network and it is basically LAN over a larger geographical distance. There are also other area networks; a Personal Area Network (PAN) is used for communication close to one person, such as fax machines and telephones. A Home Area Network (HAN) uses LAN and is used for communication between a small number of devices within a household. VPN stands for Virtual Private Network and are networks between nodes and carried by open connections, not physical wires. It is commonly used for secure communication through the public Internet.