Networking and Internet Basics ：練習問題

Which of the following is a key characteristic that distinguishes a Wide Area Network (WAN) from a Local Area Network (LAN)?

A mobile user is moving through a university campus while participating in a live video conference. As the user moves from the library to the canteen, their smartphone maintains the video stream by automatically switching its connection from one Wireless Access Point (WAP) to another within the same network. Which networking concept specifically enables this continuous connectivity?

A network designer needs to implement a Wireless Local Area Network (WLAN) in a high-density office where many users are working in close proximity. To minimize interference and maximize bandwidth, which strategy is most effective according to wireless networking standards?

In a wireless computer network, which of the following terms refers to the capability of a mobile device to maintain a continuous network connection while moving from the coverage area of one access point to another?

A company needs to connect two offices located 5 km apart. They require a high-speed communication link that is immune to electromagnetic interference (EMI). Which transmission medium is the most suitable choice?

In a computer network, what is the primary function of a switch, and how does its operation differ from that of a router regarding data movement between networks?

Name and briefly explain two common services that users can access in a typical networked environment.

During roaming in a large wireless network, explain how the system prevents TCP/IP session disconnection when a mobile device switches between wireless access points.

A school is planning to upgrade its network infrastructure. They currently use a Local Area Network (LAN) within the school building and connect to the Internet via a Wide Area Network (WAN).

(a) Compare a Local Area Network (LAN) and a Wide Area Network (WAN) by providing two key differences in their characteristics.

(b) In the school's LAN, data packets need to be efficiently directed to their correct destinations within the network, and communication needs to happen between different network segments. Identify two network connecting devices used to achieve these purposes and briefly explain the primary function of each.

(c) When the school network communicates with the Internet, a set of rules ensures that data is transmitted reliably and correctly between different systems. Name the fundamental suite of protocols that governs most Internet communication.

The Internet functions based on a set of fundamental rules and procedures known as protocols. The TCP/IP suite is the cornerstone of Internet communication.

(a) Explain the overall purpose and importance of the TCP/IP suite in enabling global Internet communication.

(b) Within the TCP/IP suite, Transmission Control Protocol (TCP) and Internet Protocol (IP) have distinct but complementary roles. Describe the primary function of each of these two protocols.