Question 1.
How many collision and broadcast domains are on a hub?

a) no collision domains, 1 broadcast domain
b) 1 collision domain, no broadcast domains
c) 1 collision domain, 1 broadcast domain
d) 1 collision domain, 2 broadcast domains

Answer

Question 2.
How can bridges be configured to filter network traffic?

a) Based on IP address
b) Based on MAC address
c) Based on network protocol
d) Based on application type

Answer

Question 3.
Which of the following best describes frame collisions on an Ethernet network?

a) Two or more stations on the segment attempt to transmit with different network protocols.
b) One end station begins to transmit during another end station's transmission.
c) Not enough bandwidth on the segment causes frames to randomly collide.
d) Two or more end stations on the segment attempt to transmit at the same time.

Answer

Answers

Question 1.
How many collision and broadcast domains are on a hub?

a) no collision domains, 1 broadcast domain
b) 1 collision domain, no broadcast domains
c) 1 collision domain, 1 broadcast domain
d) 1 collision domain, 2 broadcast domains

Answer
c) 1 collision domain, 1 broadcast domain

Explanation
The purpose of hubs is to permit more computers to join the network segment, allowing them to communicate with each other. Therefore, all devices connected to a hub become part of the same broadcast domain. All end stations connected to a hub also share the available bandwidth. Therefore, all devices connected to a hub are said to be part of the same "collision domain." They all contend for the same limited bandwidth and they all contribute to the likelihood of collisions.
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Question 2.
How can bridges be configured to filter network traffic?

a) Based on IP address
b) Based on MAC address
c) Based on network protocol
d) Based on application type

Answer
b) Based on MAC address
c) Based on network protocol

Explanation
Bridges operate at the Data Link Layer of the OSI Model so they can be configured to filter network traffic based on MAC address but not IP address. Bridges are unaware of application types and can only filter traffic based on network protocol that is identified either by the Ethernet type field or an LLC SSAP/DSAP or SNAP code.
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Question 3.
Which of the following best describes frame collisions on an Ethernet network?

a) Two or more stations on the segment attempt to transmit with different network protocols.
b) One end station begins to transmit during another end station's transmission.
c) Not enough bandwidth on the segment causes frames to randomly collide.
d) Two or more end stations on the segment attempt to transmit at the same time.

Answer
d) Two or more end stations on the segment attempt to transmit at the same time.

Explanation
A frame collision is said to occur when two or more end stations on the segment attempt to transmit at the same time.

Different network protocols will not cause a frame collision.

Because this is an Ethernet network and CSMA/CD is in effect, there will never be a time when one end station begins to transmit during another end station's transmission. The end stations listen to the line to wait until no other end station is transmitting before beginning their transmission.

Frames do not randomly collide when there is not enough bandwidth, although insufficient bandwidth can lead to network congestion.
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