CH 9: (Part 1) TCP/IP Internetworking II
In an IPv6 global unicast address, the interface ID is ________ bits long.
64
Convert the following EUI-48 address to a modified EUI-64 address: AA-00-00-FF-FF-00.
ae00:00ff:feff:ff0
Corporations wish to have ________ domain names.
second-level
In DNS, a group of resources under the control of an organization is called a ________.
domain
Your firm has a 22-bit network part. What subnet part would you select to give at least 10 subnets?
4 bits
Your firm has an 8-bit network part. If you need at least 200 subnets, what must your subnet part size be?
8
Which of the following is a private IP address range?
10.x.x.x
Your firm has a 22-bit network part and a 6-bit subnet part. How many hosts can you have per subnet?
14
Which is a type of top-level domain?
generic TLD
Which of the following IPv4 addresses would be used for Internet transmission?
128.171.x.x
If the subnet ID in an IPv6 address is 32 bits, how long is the routing prefix?
32 bits
In IP subnet planning, you need to have at least 130 subnets. How large should your subnet part be?
8
Companies get second-level domains from ________.
domain registrars
In NAT, the ________ creates new external source IP addresses and port numbers.
firewall
".com" is a ________.
top-level domain
If your subnet part is 8 bits long, you can have ________ subnets.
254
You have a 20-bit network part and a 4-bit subnet part. How many hosts can you have per subnet?
254
Your subnet part is 8 bits long. How many hosts can you have per subnet?
254
If your routing prefix is 16 bits, how long is your subnet ID?
48 bits
NAT ________. A) allows a firm to have more internal IP addresses B) reduces cost C) both A and B D) neither A nor B
A) allows a firm to have more internal IP addresses
The DNS ________ record is for the host name's ________ address A) A; IPv4 B) A; IPv6 C) AAAA; IPv4 D) none of the above
A; IPv4
The DNS ________ record is for the host name's ________ address A) AAAA; IPv4 B) AAAA; IPv6 C) both A and B D) neither A nor B
AAAA; IPv6
A step in creating an EUI-64 is dividing a 48-bit MAC address in half and inserting ________ in the center.
fffe
Which is NOT one of the three parts of a public IPv6 unicast address?
host part
For a particular domain name, a DNS server will have ________.
multiple records
The routing prefix in IPv6 is like the ________ part in an IPv4 address.
network
If your subnet part is 7 bits long, how many subnets can you have?
none of the above
NAT enhances security by ________.
preventing sniffers from learning internal IP addresses
What field in an IPv6 global unicast address corresponds to the subnet part of an IPv4 address?
subnet ID
If the local DNS server does not know an IP address and must contact a remote DNS server, which DNS server will return the response to the client?
the local DNS server
".edu" is a ________.
top-level domain
________ is a general naming system for the Internet.
DNS
The IEEE calls a 64-bit interface addresses that it designed a(n) ________ address.
Extended Unique Identifier-64
For an internal client to use NAT to communicate with an external webserver, the client must be configured to do so.
False
NAT is transparent to all applications.
False
________ is the process of presenting external IP addresses that are different from internal IP addresses used within the firm.
NAT
The highest-level DNS servers are called ________.
Root servers
A company has a domain name. What else must it have before it can make a website available to the public? A) a DNS server to host its domain name B) the website itself C) both A and B D) neither A nor B
C) both A and B
NAT ________. A) allows a firm to have more internal IP addresses B) provides some security C) both A and B D) neither A nor B
C) both A and B
The domain name system ________. A) is a way to find a host's IP addresses if your computer only knows the host's host name B) is a general naming system for the Internet C) both A and B D) neither A nor B
C) both A and B
In a large company, you want ________.
as small a routing prefix as you can have
If your local DNS server does not know the host name of an IP address, it will get the address from a(n) ________.
authoritative DNS server
The part of an IPv6 global unicast address that designates the host is called the ________.
interface ID
