Ch. 3 Addressing on Networks

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

• The network identifier

• The OUI

• The device identifier

• The physical address

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?

• Default gateway

• DNS server

• Root server

• DHCP server

What decimal number corresponds to the binary number 11111111?

• 255

• 256

• 127

• 11,111,111

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

• All devices on the Internet

• All devices on your local network

• The one device that is configured with this IP address

• No devices

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

• FF00::/8

• 2001::/64

• 2001::/3

• FE80::/10

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?

• ipconfig /release

• ipconfig /renew

• ifconfig /release

• ifconfig /renew

Which type of DNS record identifies an email server?

• AAAA record

• CNAME record

• MX record

• PTR record

Which of these commands is available only in Linux?

• ping

• ipconfig

• dig

• nslookup

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

• Authoritative name servers

• Root servers

• Top-level domain servers

• Primary DNS servers

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?

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

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

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

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