NET+ Quiz Part 12

What does the CSMA/CA access method use to avoid potential collisions?

• A) A "listen before talking" strategy

• B) A "talk before listening" strategy

• C) A "send and receive simultaneously" strategy

• D) A "collision detection" strategy

Answer explanation

The CSMA/CA access method uses a 'listen before talking' strategy to avoid potential collisions.

What does a hop count of infinity indicate in routing metrics?

• A) The route is optimal

• B) The route is unreachable

• C) The route is the shortest path

• D) The route is the most expensive

Answer explanation

A hop count of infinity in routing metrics indicates that the route is unreachable, as the packets cannot reach their destination through that route.

What does the maximum transmission unit (MTU) define?

• A) The number of hops necessary to reach a node

• B) The largest data unit that can be passed without fragmentation

• C) The maximum packet size permitted for Internet transmission

• D) The amount of time it takes for a packet to travel from one location to another

Answer explanation

The largest data unit that can be passed without fragmentation is defined by the maximum transmission unit (MTU).

What does bandwidth specify in routing metrics?

• A) The number of hops necessary to reach a node

• B) The largest data unit that can be passed without fragmentation

• C) The maximum packet size permitted for Internet transmission

• D) The amount of time it takes for a packet to travel from one location to another

Answer explanation

Bandwidth specifies the maximum packet size permitted for Internet transmission, making option C the correct choice.

What is administrative distance in routing metrics?

• A) The number of hops necessary to reach a node

• B) The largest data unit that can be passed without fragmentation

• C) A numerical value assigned to a route based on its perceived quality

• D) The amount of time it takes for a packet to travel from one location to another

Answer explanation

Administrative distance in routing metrics is a numerical value assigned to a route based on its perceived quality, helping routers determine the best path when multiple routes are available.

What is latency in routing metrics?

• A) The number of hops necessary to reach a node

• B) The largest data unit that can be passed without fragmentation

• C) The maximum packet size permitted for Internet transmission

• D) The amount of time it takes for a packet to travel from one location to another

Answer explanation

This is an example explanation.

What is the big advantage of shortest path bridging (SPB) based on IEEE 802.1aq?

• A) It allows for multiple equal cost paths, leading to faster convergence times

• B) It reduces the number of hops necessary to reach a node

• C) It increases the maximum packet size permitted for Internet transmission

• D) It decreases the amount of time it takes for a packet to travel from one location to another

Answer explanation

The big advantage of shortest path bridging (SPB) based on IEEE 802.1aq is that it allows for multiple equal cost paths, leading to faster convergence times, making option A the correct choice.

What is the IEEE specification developed to ensure interoperability of VLAN technologies from various vendors?

• 802.1Q

• 802.11

• 802.3

• 802.15

Answer explanation

The IEEE specification developed to ensure interoperability of VLAN technologies from various vendors is 802.1Q.

What is one of the primary benefits of using VLANs in a network?

• Increased network complexity

• Increased network performance

• Increased hardware costs

• Increased physical cabling

Answer explanation

One of the primary benefits of using VLANs in a network is increased network performance, as they help in segmenting traffic and improving overall network efficiency.

How can VLANs improve network security?

• By combining all network segments into one

• By isolating certain network segments from others

• By increasing the number of routers

• By reducing the number of switches

Answer explanation

By isolating certain network segments from others, VLANs can improve network security by preventing unauthorized access and reducing the risk of attacks spreading across the network.