CCST IP Addressing & Subnetting 5

Question 1

Which IPv4 address block is used for testing and documentation purposes only (TEST-NET)?

Accepted Answer

192.0.2.0/24

Answer

192.0.2.0/24 is designated by RFC 5737 as TEST-NET-1, reserved for documentation and example use.

Question 2

A router interface is configured with IP address 10.1.1.1/30. How many usable hosts can connect to this link?

Accepted Answer

2

Answer

A /30 subnet has 4 addresses total: 1 network, 2 hosts, and 1 broadcast — making it ideal for point-to-point links.

Question 3

What is the result of ANDing a host IP address with its subnet mask?

Accepted Answer

The network address

Answer

ANDing an IP address with its subnet mask zeroes out the host bits, revealing the network address.

Question 4

A packet destined for 10.5.3.255 on a 10.5.3.0/24 network will be sent to which type of address?

Accepted Answer

Directed broadcast

Answer

10.5.3.255 is the directed broadcast address for the 10.5.3.0/24 subnet, delivered to all hosts on that subnet.

Question 5

Which supernet correctly summarizes the subnets 192.168.4.0/24 through 192.168.7.0/24?

Accepted Answer

192.168.4.0/22

Answer

Four consecutive /24 subnets (4–7) can be summarized as a single /22 block starting at 192.168.4.0.

(CCST) Cisco Certified Support Technician Networking Practice Test