21⟩ Convert 101000101111010110011101100010112 to dotted decimal.
Convert to dotted hexadecimal first, and then convert each hexadecimal number pair to decimal.
A2.F5.9D.8B then 162.245.157.139
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88 CCNP Questions And Answers
22⟩ Convert 101000101111010110011101100010112 to octal.
24275316613 8
23⟩ True or False. Converting between number bases is fun.
Answer is True
24⟩ Convert 12345670 8 to hexadecimal.
Convert each octal digit into three binary digits, and then convert the binary result to hexadecimal.
001 010 011 100 101 110 111 000
0010 1001 1100 1011 1011 1000
29CBB8
25⟩ Convert 734215 8 to binary.
111 011 100 010 001 101
26⟩ Convert 734215 16 to binary.
0111 0011 0100 0010 0001 0101 2
27⟩ What is the broadcast address for network 142.16.72.0/23?
142.16.73.255
28⟩ Subnet 198.4.81.0/24 into the maximum number of networks that can support 28 hosts each.
198.4.81.0/27 and the subnets are:
198.4.81.0/27
198.4.81.32/27
198.4.81.64/27
198.4.81.96/27
198.4.81.128/27
198.4.81.160/27
198.4.81.192/27
198.4.81.224/27
29⟩ What is the broadcast address for network 198.4.81.96/27?
198.4.81.127
30⟩ What is the prefix and subnet mask that summarizes the following networks
162.8.0.0/22
162.8.4.0/22
162.8.8.0/22
162.8.12.0/22
31⟩ Using the following routing table, determine the best route to reach the host at address 132.19.237.5. Network Output Interface 132.0.0.0/8 Serial 0 132.16.0.0/11 Ethernet 1 132.16.233.0/22 Ethernet 2
132.16.0.0/11 because it matches more network bits than 132.0.0.0/8. Network 132.16.233.0/22 and 132.19.237.5/22 do not match on the network address.
32⟩ What is the range of host addresses for network 172.16.53.96/27?
172.16.53.97 through 172.16.53.126
33⟩ How many two-host subnets can be made from a /24 network?
64 because 2 bits are needed for the hosts on the network, leaving 6 bits for the subnet.
34⟩ What is the full IPv6 address represented by FF02130F5?
FF02:0000:0000:0000:0000:0000:130F:0005
35⟩ Explain the difference between a classful and a classless routing protocol.
Classless routing protocols advertise subnet mask information along with the network prefixes. Classful routing protocols do not. Therefore, for a classful protocol, all subnets for the major network number being used must be the same length. Also, classful protocol cannot support discontiguous networks prefixes.
36⟩ What are the states that an EIGRP route can be in and what do these states mean?
The passive state means that a router has a successor for a route. The active state means that a router does not have a successor or feasible successor for a route and is actively sending queries to neighbors to get information about the route.
37⟩ Explain the relationship between reported distance and feasible distance and how they determine successors and feasible successors.
The reported distance to a route that is sent to another router is the feasible distance on the reporting router. Feasible distance is the reported distance plus the metric between the receiving and reporting routers. The route with the lowest feasible distance is the successor. Any routes with a reported distance that is less than the feasible distance are feasible successors.
38⟩ Determine the EIGRP command to summarize the following networks 10.1.0.0/19 10.1.32.0/19 10.1.64.0/19 10.1.96.0/19
You need to examine the third byte because that is the byte where the four prefixes differ:
0 = 0 0 0 0 0 0 0 0
32 = 0 0 1 0 0 0 0 0
64 = 0 1 0 0 0 0 0 0
96 = 0 1 1 0 0 0 0 0
The last 7 bits are irrelevant, so the mask is 1 0 0 0 0 0 0 0 and the EIGRP command is ip summary-address eigrp 1 10.1.0.0 255.255.128.0.
39⟩ What are the purposes of areas in an OSPF network?
Areas allow the design of a hierarchical network. Routes can be summarized or blocked in an area to reduce the amount of routing information on internal OSPF routers.
40⟩ Describe why postal addresses and telephone numbers are routable.
A postal address has three components that can be used to deliver mail: state, city, and street. A phone number has an area code and exchange. At the core layer, mail can be delivered to the next post office based on only the state or city and state information. A phone number is delivered at the core layer based on the area code.
