Chapter 3 Review

Question 1

Which type of DNS record identifies an email server?

A. CNAME record
B. MX record
C. PTR record
D. AAAA record

Answer 1

MX Record

Question 2

What type of device does a computer turn to first when attempting to make contact with a host with a known IP address on another network?

A. DNS server
B. Root server
C. Default gateway
D. DHCP server

Answer 2

Default Gateway

Question 3

Which of these commands is available only in Linux?

A. dig
B. ipconfig
C. ping
D. nslookup

Answer 3

Dig

Question 4

If you are connected to a network that uses DHCP, and you need to terminate your Windows workstation’s DHCP lease, which command would you use?

A. ipconfig /renew
B. ipconfig /release
C. ifconfig /renew
D. ifconfig /release

Answer 4

ipconfig /release

Question 5

Which computers are the highest authorities in the Domain Name System hierarchy?

A. Authoritative name servers
B. Top-level domain servers
C. Primary DNS servers
D. Root servers

Answer 5

Root servers

Question 6

Suppose you send data to the 11111111 11111111 11111111 11111111 IP address on an IPv4 network. To which device(s) are you transmitting?

Answer 6

All devices on your local network

Question 7

What decimal number corresponds to the binary number 11111111?

A. 255
B. 11,111,111
C. 256
D. 127

Answer 7

255

Question 8

Which part of a MAC address is unique to each manufacturer?

A. The physical address
B. The network identifier
C. The OUI
D. The device identifier

Answer 8

The OUI

Question 9

When your computer first joins an IPv6 network, what is the prefix of the IPv6 address the computer first configures for itself?

A. 2001::/3
B. FF00::/8
C. FE80::/10
D. 2001::/64

Answer 9

FE80::/10

Question 10

You have just brought online a new secondary DNS server and notice your network-monitoring software reports a significant increase in network traffic. Which two hosts on your network are likely to be causing the increased traffic and why?

A. The secondary and primary DNS servers, because the secondary server is requesting zone transfers from the primary server

B. The caching and primary DNS servers, because the caching server is requesting zone transfers from the primary server

C. The web server and primary DNS server, because the web server is requesting zone transfers from the primary DNS server

D. The root and primary DNS servers, because the primary server is requesting zone transfers from the root server

Answer 10

The secondary and primary DNS servers, because the secondary server is requesting zone transfers from the primary server