1. List some of the major tasks that should be accomplished in the design phase.
ID: 3792911 • Letter: 1
Question
1. List some of the major tasks that should be accomplished in the design phase.
2. What are the layers in the Cisco hierarchical network design model?
3. To determine how IP addresses should be assigned, what are the decisions a designer has to make?
4. Who should be included in created a security policy?
5. What are the prefix and suffix of an IP address?
6. List the number of networks and number of hosts that can be specified by each of the primary classes.
7. For the given binary number 11010111, find its corresponding decimal value.
8. For the given binary IP address 00001011 00001100 10011011 00000010, what is the corresponding decimal IP address?
9. What is the range of decimal values for the first octet of an IP address in each primary class?
10. What are the network IDs for the IP addresses 10.134.155.20, 172.6.23.10, and 192.168.2.11?
11. What are the dedicated broadcast addresses for the IP addresses 10.134.155.20, 172.6.23.10, and 192.168.2.11?
12. Lists all the three blocks of private IP addresses.
13. What are the improvements of IPv6 over IPv4?
14. What are the subnet masks for the three primary classes?
15. For the IP address 192.168.171.65 and the subnet mask 255.255.255.252, determine the network ID and broadcast IP address for the subnet that contains the given IP address. Also, find how many subnets and how many hosts in each subnet can be specified by the subnet mask 255.255.255.252.
16. For the IP address 172.16.20.0 and the subnet mask 255.255.248.0, determine the network ID and broadcast IP address for the subnet that contains the given IP address. Also, find how many subnets and how many hosts in each subnet can be specified by the subnet mask 255.255.248.0.
17. For the IP address 10.33.4.211 and the subnet mask 255.224.0.0, determine the network ID and broadcast IP address for the subnet that contains the given IP address. Also, find how many subnets and how many hosts in each subnet can be specified by the subnet mask 255.224.0.0.
18. Create a subnet under a standard Class B network so that the subnet is large enough to include both the IP addresses 129.5.18.116 and 129.5.29.12. What is the ID for the subnet that includes both these IP addresses?
19. For the given IP address 192.168.200.74 and subnet mask 255.255.255.240, what is the equivalent CIDR expression?
20. For the given CIDR expressions 128.10.0.0/19, find the equivalent subnet mask.
Explanation / Answer
Following are the answers to the questions:
A.1.)Following are some of the major tasks that should be accomplished in the design phase:
a. The designer will have to investigate the requirements for the network and has to develop a logical network model which should includes the specifications for applications, protocols, network devices and network media.
b. The designer develops an IP addressing and routing strategy and security policy.
c. A plan for the physical implementation of the network needs to be developed based on the logical network.
A.2.) The CISCO hierarchial model has 3 layers which are the core layer, the distribution layer and the access layer.
A.3.)a.)The designer has to select if he would use either public or private IP addresses for hosts and subnets and classless or classfull IP addresses.
b.)To use flat routing infrastructure or heirarchial routing infrastructure.
c.)To determine if he would use variable length subnet mask or supernetting.
d.)Whether he would opt for static IP or dynamic IP addressing.
A.4.)While creating a security policy, the organization's Network managers, administrators and user representatives would work together as a team.
A.5.)The prefix is used to identify networks and suffix is used to identify the hosts in the network.
A.6).Class A - Network Ids- 126 and Host IDs - 16,277,214
Class B - Network Ids - 16,384 and host Ids-65,534
Class C - Network Ids - 2,09,152 and host Ids - 254
A.7.)The decimal equivalent of binay number 11010111 is 215.
A.8.)The decimal address for the binary address given is 11.12.155.2
A.9).
Class A addresses only include IP starting from 1.x.x.x to 126.x.x.x only
Class B IP Addresses range from 128.0.x.x to 191.255.x.x.
Class C IP addresses range from 192.0.0.x to 223.255.255.x.
Class D has IP address rage from 224.0.0.0 to 239.255.255.255.
IP addresses in this class ranges from 240.0.0.0 to 255.255.255.254.
A.10.)
The network is 10.134.155.0 is 00001010.10000110.10011011 .00000000 and it is Class A network.
The network ID for 172.6.23.0 is 10101100.00000110.00010111 .00000000 (Class B)
The network ID for 192.168.2.11 is 11000000.10101000.00000010 .00000000 (Class C)
A.11.) Kindly provide the subnet mask to find out the broadcast address.
A.12.)The 3 blocks of private IP addresses are the 24-bit block, the 20-bit block and the 16-bit block.
A.13.)Following are the improvements of IPV6 over IPV4:
a.) IPV6 supports a large number of IP addresses.
b.)IPV6 does not support broadcasting, however it supports, unicast,multicast and anycast.
c.)It can create a high quality path between the sender and the receiver to transmit multimedia content.
d.)It is built-in encryption service to assist data security.
A.14.)Subnet masks for the three primary classes are as follows:
Class A: 255.0.0.0
Class B:255.255.0.0
Class C:255.255.255.0
A.15.)For the IP address 192.168.171.65 and the subnet mask 255.255.255.252
Network ID is 11000000.10101000.10101011 .00000000 (Class C)
Broadcast Address: 192.168.171.67
and 254 hosts can be used.
A.16.)For the IP address 172.16.20.0 and the subnet mask 255.255.248.0
Network ID is:10101100.00010000.00010100 .00000000 (Class B)
The Broadcast address is :172.16.23.255
A.17.) For the IP address 10.33.4.211 and the subnet mask 255.224.0.0,
Netwok ID is: 00001010.00100001.00000100 .00000000 (Class A)
Broadcast address is:10.63.255.255
and there are 254 hosts.
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