Network+ Chapter 5 Review Questions

A client with an IP address of 172.16.18.5/18 belongs to what network? a. 172.16.0.0/18 b. 172.16.64.0/18 c. 172.16.96.0/18 d. 172.16.128.0/18

a. This host address and subnet mask combination references the following subnet of usable addresses: 172.16.0.1 to 172.16.63.254.

What technology allows for the automatic assignment of the host portion of the IPv6 address? a. Dual Stack b. EU164 c. Neighbor discovery d. Anycast

b. EU164 in IPv6 permits the automatic generation of host portions of addresses.

Which of the following are dynamic approaches to assigning routable IP addresses to networked devices? (Choose two.) a. BOOTP b. APIPA c. Zeroconf d. DHCP

a, d. Notice that a key to this question is "routable IP addresses." Only BOOTP and DHCP are valid options in this case.

What is the class of IP address 10.1.2.3/24? a. Class A b. Class B c. Class C d. Class D

a. Because the decimal value 10 appears in the first octet, we know that this is a Class A address.

How many assignable IP addresses exist in the 172.16.1.10/27 network? a. 30 b. 32 c. 14 d. 64

a. There are 5 bits left here for host address assignment, and 2 raised to the fifth power is 32. You then subtract 2 for the network ID and broadcast address.

What is the binary representation of the decimal number 117? a. 10110101 b. 01110101 c. 10110110 d. 01101001

b. The binary representation of 117 is 01110101. Notice that this has values of 64 + 32 + 16 + 4 + 1.

What is the prefix notation for a subnet mask of 255.255.255.240? a. /20 b. /24 c. /28 d. /29

c. /28 is the prefix notation for 255.255.255.240. Notice the mask consists of 8 bits + 8 bits + 8 bits + 4 bits.

How can the following IPv6 address be condensed? 2009:0123:4040:0000:0000:000:000A:100B a. 2009::123:404:A:100B b. 2009::123:404:A:1B c. 2009:123:4040::A:100B d. 2009:0123:4040::0::000A:100B

c. Remember, you can drop the leading zeros in any field, and once within an address you can represent continuous sections of zeros with the shorthand symbol of ::.

Your company has been assigned the 192.168.30.0/24 network for use at one of its sites. You need to use a subnet mask that will accommodate seven subnets while simultaneously accommodating the maximum number of hosts per subnet. What subnet mask should you use? a. /24 b. /26 c. /27 d. /28

c. Using a /27 mask gives you 3 bits for subnetting. This permits the creation of eight subnets and satisfies your requirement of seven and gives you the most possible host addresses per subnet.

The binary number 10110100 has what decimal equivalent? a. 114 b. 190 c. 172 d. 180

d. 10110100 is the equivalent of 180 because we have 128 + 32 + 16 + 4.

What type of IPv4 address is 239.1.2.3? a. Unicast b. Experimental c. Private use only d. Multicast

d. 239.1.2.3 is an example of a multicast IP address. We use multicast to send a single packet to groups of systems that have "subscribed" to this address.