NETWORK DESIGN AND ADMINISTRATION QUESTION EXAMPLE

St. Augustine University of Tanzania
Ruaha University College (RUCO)
Faculty of ICT, Department of Computer Science
NETWORK DESIGN AND ADMINISTRATION
IP Addressing

1. True or false: 255.255.255.248 and /28 are two representations of the same IP mask.

2. True or false: NAT uses different IP addresses for translations. PAT uses different port numbers to identify translations.

3. True or false: The IP header’s header checksum field performs the checksum of the IP header and data.

4. List the eight fields of the IPv6 header.

5. IPv6 uses how many more bits for addresses than IPv4?
a. 32 b. 64 c. 96 d. 128

6. What is the length of the IPv6 header?
a. 20 bytes b. 30 bytes c. 40 bytes d. 128 bytes

7. Which of the following is an “IPv4-compatible” IPv6 address?
a. ::180.10.1.1
b. f000:0:0:0:0:0:180.10.1.1
c. 180.10.1.1::
d. 2010::180.10.1.1

8. Which of the following are IPv6 enhancements over IPv4?
a. Larger address space, globally private IP address, multicast
b. Larger address space, globally unique IP addresses, no broadcasts
c. Larger address space, globally private IP address, multicast
d. Larger address space, address auto-configuration, enhanced broadcasts

9. What are three scope types of IPv6 addresses?
a. Unicast, multicast, broadcast b. Unicast, anycast, broadcast c. Unicast, multicast, endcast d. Unicast, anycast, multicast

10. Which of the following addresses is an IPv4 private address?
a. 198.176.1.1 b. 172.31.16.1 c. 191.168.1.1 d. 224.130.1.1

11. How many IP addresses are available for hosts in the subnet 198.10.100.64/27?
a. 14 b. 30 c. 62 d. 126

12. What subnet mask should you use in loopback addresses?
a. 255.255.255.252 b. 255.255.255.254 c. 255.255.255.0 d. 255.255.255.255

13. What type of address is 225.10.1.1?
a. Unicast b. Multicast c. Broadcast d. Anycast

14. Which subnetworks are summarized by the following summary route: 150.10.192.0/21?
a. 150.10.192.0/24, 150.10.193.0/24 b. 150.10.192.0/22, 150.10.196.0/23, 150.10.197.0/24 c. 150.10.192.0/22, 150.10.199.0/22 d. 150.10.192.0/23, 150.10.194.0/23, 150.10.196.0/23, 150.10.197.0/24, 150.10.198.0/24

15. What type of network and subnet mask would you use to save address space in a point-to-point WAN link?
a. 100.100.10.16/26 b. 100.100.10.16/28 c. 100.100.10.16/29 d. 100.100.10.16/30

16. Calculate the subnet, the address range within the subnet, and the subnet broadcast of the address 172.56.5.245/22.

17. When packets are fragmented at the network layer, where are the fragments reassembled?

18. How many host addresses are available with a Class B network with the default mask?

19. Which of the following is a dotted-decimal representation of a /26 prefix mask?
a. 255.255.255.128
b. 255.255.255.192
c. 255.255.255.224
d. 255.255.255.252

20. A packet sent to a multicast address reaches what destinations?
a. The nearest destination in a set of hosts.
b. All destinations in a set of hosts.
c. Broadcasts to all hosts.
d. Reserved global destinations.

21. What are three types of IPv4 addresses?
a. Anycast
b. Multicast
c. Dynamic
d. Broadcast
e. Unicast
f. Global
g. Static

22. Which devices should be assigned an IP address dynamically? (Select three.)
a. Cisco IP phones
b. LAN switches
c. Workstations
d. Mobile devices
e. Routers

23. How many hosts can be addressed with the following IPv4 subnet: 172.30.192.240/28?
a. 6
b. 14
c. 126
d. 1024

24. What is the smallest subnet and mask that can be used in a DMZ network that needs to have only three hosts?
a. 192.168.10.32/30
b. 192.168.10.32/29
c. 192.168.10.32/28
d. 192.168.10.32/27

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