1. What is the difference between a switch and a router? Ans: Switch is a device which is used to connect multiple computer’s with in a single network and allow to transfer data between them. Router is used to connect multiple network’s and route between them based on IP addresses. 2. What is the purpose of the subnet mask in IP addressing? Ans: A subnet Mask is used in IP addressing to divide a large network into a smaller subnetwork, subnet mask help to determine for which part of IP address is designated for network portion and which part is for host portion 3. How does TCP/IP work and what are its key components? Ans: TCP/IP is a set of protocols that allow communication between devices over a network. Its key components are: IP (Internet Protocol): responsible for routing data packets to their destination. TCP (Transmission Control Protocol): responsible for reliable data transfer by dividing data into segments, retransmitting lost packets and reassembling the data at the receiver. DNS (Domain Name System): responsible for converting human-readable domain names into IP addresses. HTTP (HyperText Transfer Protocol): responsible for transmitting data over the web. FTP (File Transfer Protocol): responsible for transferring files over a network. These protocols work together to transfer data between devices over the internet or other networks. 4. Can you explain the OSI model and its purpose? Ans: The OSI (Open Systems Interconnection) model is a theoretical framework that defines the functions of a communication system. It divides the...