Networking

1. How many valid host addresses are on the network 172.16.41.0/27? (2 points)

a. 65,534

b. 30

c. 14

d. 254

2. Which statement is not correct about the IP address 10.16.3.65/23? (2 points)

a. The subnet address is 10.16.3.0 255.255.254.0.

b. The lowest host address in the subnet is 10.16.2.1 255.255.254.0.

c. The last valid host address in the subnet is 10.16.3.254 255.255.254.0.

d. The broadcast address of the subnet is 10.16.3.255 255.255.254.0.

3. What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet mask? (2 points)

a.14

b.15

c.16

d.30

4. To test the IP stack on your local host, which IP address will you ping? (2 points) a.127.0.0.0

b.1.0.0.127

c.127.0.0.1

d.255.255.255.0

5. You need to subnet a network that has 5 subnets, each with at least 16 hosts. Which can be your choice? (2 points)

a.255.255.255.192

b.255.255.255.224

c.255.255.255.240

d.255.255.255.248

6. What is the subnetwork number of a host with an IP address of 172.16.65.1/18? (2 points) a.172.16.66.0

b.172.16.64.0

c.172.16.48.0

d.172.16.36.0

7. You have a network that needs 29 subnets while maximizing the number of host addresses available on each subnet. How many bits must you borrow from the host field to provide the correct subnet mask? (2 points) a. 2

b. 3

c. 4

d. 5

8. The network address of 172.16.0.0/19 provides how many subnets and hosts? (2 points) a. 7 subnets, 30 hosts each

b. 8 subnets, 8,190 hosts each

c. 8 subnets, 2,046 hosts each

d. 7 subnets, 2,046 hosts each

9. Which switching method is depicted in the diagram below? (2 points)

a. Store-and-Forward

b. Cut-Through

c. Fragment Free

d. Fast switching

10. Which two options will help to solve the problem of a network that is suffering a broadcast storm? (Choose two) (4 points) a. a bridge

b. a router

c. a hub

d. a Layer 3 switch

e. an access point

11. Refer to the exhibit. If the hubs in the graphic were replaced by switches, what would be virtually eliminated? (2 points)

a. broadcast domains

b. repeater domains

c. Ethernet collisions

d. signal amplification

e. Ethernet Broadcast

12. What is the network address and subnet mask (in CIDR notation) of the hidden (xxx.xxx.xxx.xxx/xx) subnet? The whole network has a network address and subnet mask of 192.168.0.0/23. (4 points)

13. What is the difference between contention-based and control-based networks? Which medium access control method is used in contention-based networks? Explain this method elaborately. (10 points)

14. As you can see in the following exhibit, PC A is communicating with a File Server which is located on the same local network. Explain ARP process in this scenario and fill out the L2 Ethernet header and L3 IP packet with the relevant addresses. (10 points)

15. Consider the network below, the network administrator has assigned the lowest available IP from the subnet to R1 and the highest to SW1, What IP address should PC1 use for a default gateway in order to reach the remote networks? (2 points)