Communication：练习题

Which of the following is a key characteristic of fibre-optic cables when compared to copper cables in a wired network infrastructure?

A network administrator decides to use a bridge instead of a repeater to connect two segments of a Local Area Network (LAN). What is the primary functional difference that justifies this choice?

When a web browser requests a resource using a URL, the Domain Name Service (DNS) process begins. What is the specific role of the Recursive Resolver (usually provided by an ISP) in this sequence?

Which type of cloud computing is managed by a third-party provider and shares its physical server resources among multiple different organizations?

In a large-scale network, a mesh topology is often selected for critical infrastructure. Which of the following is the primary advantage of a full mesh topology compared to a star topology?

State one reason why a large organization might prefer a hybrid cloud model over using only a public cloud.

A network uses the Carrier Sense Multiple Access / Collision Detection (CSMA/CD) protocol. Describe the action taken by a node immediately after it detects that a collision has occurred during data transmission.

In the context of bit streaming, explain why a high bit rate is necessary for high-definition video and describe the impact of a buffer on the user experience.

Local Area Networks (LANs) often require specific hardware to maintain signal strength and link different segments together.

(a) Describe the purpose of a repeater in a network.
(b) Explain how a bridge is used to connect two separate LAN segments so they can function as a single logical network.

IP addresses are essential for identifying devices on a network and ensuring data reaches the correct destination.

(a) Contrast static IP addresses and dynamic IP addresses, explaining how each is assigned to a device.
(b) Justify the use of a static IP address for a company's internal file server.
(c) Describe the role of a default gateway in a network when a local device attempts to send data to a host on a remote Wide Area Network (WAN).