Network Devices 1: Internetworking Devices Overview

What is the primary function of a bridge in a network?

To route traffic between different network segments
To filter and forward frames based on their destination addresses (correct)
To provide a high-speed connection between network segments
To manage the routing table for the entire network

How does a bridge learn the location of network nodes?

By maintaining a static configuration file that maps nodes to interfaces
By periodically sending out broadcasts to discover connected nodes
By recording the source address and incoming interface when receiving frames (correct)
By querying a central routing server for the location of each node

What happens when a bridge receives a frame for a destination it doesn't have in its filtering table?

The bridge drops the frame
The bridge forwards the frame to all connected interfaces (correct)
The bridge sends a request to the source to learn the destination's location
The bridge updates its routing table and forwards the frame to the appropriate interface

What is the main limitation of using bridges in a network?

Bridges can become a bottleneck when there is too much traffic between network segments (D) Signup and view all the answers

What is the purpose of the filtering table maintained by a bridge?

To determine which interfaces to forward frames to based on the destination address (C) Signup and view all the answers

How does a bridge handle a frame sent from node C to node D, when it has no information about D in its filtering table?

The bridge forwards the frame to all interfaces except the one it was received on (C) Signup and view all the answers

What layer of the OSI model do bridges work at?

Data Link Layer (A) Signup and view all the answers

What is the main advantage of using bridges?

Isolation of collision domains (B) Signup and view all the answers

How do bridges filter packets?

By examining only the frame header (A) Signup and view all the answers

What happens if the destination address is in the same segment as the source address?

The bridge stops transmitting the frame (D) Signup and view all the answers

Why can't bridges filter packets according to their protocols?

Inability to interpret higher-level information (B) Signup and view all the answers

What technology does a bridge use to access and transmit frames on a segment?

CSMA/CD (Carrier Sense Multiple Access with Collision Detection) (B) Signup and view all the answers

What is the primary function of a hub in a computer network?

To connect multiple devices and broadcast data to all ports (B) Signup and view all the answers

Why might a repeater be used in a network?

To regenerate and amplify weakened signals over long cable lengths (B) Signup and view all the answers

What is a key disadvantage of using a hub compared to other internetworking devices?

Hubs do not isolate collision domains across network segments (B) Signup and view all the answers

Which statement about hubs is not true?

Hubs can connect network segments with different access methods (B) Signup and view all the answers

What is a key advantage of using a hub over other internetworking devices?

Hubs provide an economical way to expand and connect networks (B) Signup and view all the answers

Which layer of the OSI model do hubs and repeaters operate at?

Physical layer (D) Signup and view all the answers

Which of the following is a limitation of switches when handling heavy traffic?

All of the above (D) Signup and view all the answers

In the cut-through switching mode, which of the following statements is true?

It reads the first 14 bytes of each packet and then transmits it (A) Signup and view all the answers

What is the primary advantage of the store-and-forward switching mode?

It can detect and prevent the propagation of corrupt packets (D) Signup and view all the answers

Which of the following statements about routers is correct?

Routers are used to pass data packets between networks based on network protocol information (B) Signup and view all the answers

Which statement best describes the function of video conferencing in the context of the given information?

The given information does not provide any details about video conferencing (C) Signup and view all the answers

What is the purpose of the Frame Check Sequence (FCS) mentioned in the context of switching modes?

To detect and prevent the propagation of corrupt packets (C) Signup and view all the answers

What is the primary function of a modem?

To modulate digital signals into analog signals for transmission over telephone lines (D) Signup and view all the answers

Which of the following is NOT a typical I/O interface found in modems?

Ethernet interface (C) Signup and view all the answers

What is the difference between baud rate and bits per second (bps) in modem performance?

Baud rate measures the number of signal changes per second, while bps measures the number of bits transmitted per second (D) Signup and view all the answers

Why is the theoretical maximum speed of 56 kbps for V.90 modems not achievable in practice?

The actual data link is 64 kbps, and some overhead data is required for communication (D) Signup and view all the answers

What is the key difference between asynchronous and synchronous modems?

Asynchronous modems have no clocking devices, while synchronous modems have clocking devices (B) Signup and view all the answers

What is the purpose of modulating a digital signal into an analog signal in a modem?

To enable the digital signal to be transmitted over telephone lines (B) Signup and view all the answers