DCN Midterm

What is the main purpose of a subnet mask in networking?

• To encrypt network data

• To divide an IP address into network and host portions

• To increase internet speed

• To detect network failures

Which subnet mask corresponds to a Class C network?

• 255.255.0.0

• 255.0.0.0

• 255.255.255.0

• 255.255.255.255

What is the primary benefit of subnetting?

• Increases available IP addresses

• Enhances network security and reduces broadcast traffic

• Eliminates the need for IP addressing

• Slows down network performance

How is a broadcast address determined in a subnet?

• It is the lowest IP address in the subnet

• It is the highest IP address in the subnet

• It is randomly assigned by the router

• It is the middle IP address in the subnet

What is the subnet mask for the network 192.168.1.0/25?

• 255.255.255.128

• 255.255.255.252

• 255.255.255.0

• 255.255.255.64

In subnetting, what happens when more bits are borrowed from the host portion?

• The number of usable IP addresses decreases

• The number of available subnets decreases

• The subnet mask decreases

• The network becomes unusable

Which protocol commonly uses broadcast addresses to discover MAC addresses?

• TCP

• DNS

• ARP

• ICMP

What is a VLAN used for?

• To physically connect different networks

• To logically group devices on a network

• To slow down network traffic

• To replace routers

Which of the following is a benefit of using VLANs?

• Increased network congestion

• Less control over traffic management

• Improved security and performance

• Higher costs

How does a VLAN improve network security?

• By preventing any data exchange between devices

• By grouping sensitive devices logically, limiting unauthorized access

• By increasing the physical distance between devices

• By making the network slower