Computer Network Security Study Guide PDF

**LESSON 3 -- COMPUTER NETWORK SECURITY** - - - **Twisted pair cable:** It is a high-speed cable that transmits the data over **1Gbps** or more. - **Coaxial cable:** Coaxial cable resembles like a TV installation cable. Coaxial cable is more expensive than twisted pair cable, but...

**LESSON 3 -- COMPUTER NETWORK SECURITY** - - - **Twisted pair cable:** It is a high-speed cable that transmits the data over **1Gbps** or more. - **Coaxial cable:** Coaxial cable resembles like a TV installation cable. Coaxial cable is more expensive than twisted pair cable, but it provides the high data transmission speed. - **Fiber optic cable:** Fiber optic cable is a high-speed cable that transmits the data using light beams. It provides high data transmission speed as compared to other cables. It is more expensive as compared to other cables, so it is installed at the government level - **Resource sharing:** Resource sharing is the sharing of resources such as programs, printers, and data among the users on the network without the requirement of the physical location of the resource and user. - **Server-Client model:** Computer networking is used in the **server-client model**. A server is a central computer used to store the information and maintained by the system administrator. Clients are the machines used to access the information stored in the server remotely. - **Communication medium:** Computer network behaves as a communication medium among the users. For example, a company contains more than one computer has an email system which the employees use for daily communication. - **E-commerce:** Computer network is also important in businesses. We can do the business over the internet. For example, amazon.com is doing their business over the internet, i.e., they are doing their business over the internet. - - - - - - - - - - - - - - - - - - - - **Wired NIC:** The Wired NIC is present inside - - - - - - - - - - - Local Area Network is a group of computers connected to each other in a small area such as building, office. - LAN is used for connecting two or more personal computers through a communication medium such as twisted pair, coaxial cable, etc. - It is less costly as it is built with inexpensive hardware such as hubs, network adapters, and Ethernet cables. - The data is transferred at an extremely faster rate in Local Area Network. - Local Area Network provides higher security. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - **Intranet advantages:** - - - - -