Chapter 4

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Eastern Gateway Community College *

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132

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Computer Science

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Dec 6, 2023

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4.1.9 1 - What is the decimal format of the following binary IP address? 11001110.00111010.10101010.01000011 - 206.58.170.67 2 - What is the correct binary form of the decimal IP address 192.168.1.1? - 11000000.10101000.00000001.00000001 3 – 4 - Which of the following are valid IP addresses - 172.17.1.3 AND 224.0.0.1 AND 137.65.1.1 5 - workstation has been assigned the following IP addressing information:  IP address: 192.168.1.26  Subnet mask: 255.255.255.0  Default gateway: 192.168.1.254  DNS server: 192.168.1.1

Given this information, what is the network IP address of this workstation? - 192.168.1.0 6 - A network host has an IP address of 137.65.1.2 assigned to it. Given that the network uses the default classful subnet mask, what is the default routing prefix for this address using CIDR subnet mask notation? - /16 7 - Your network uses a network address of 137.65.0.0 with a subnet mask of 255.255.0.0. How many IP addresses are available for assignment to network hosts on this network? – 65534 8 - Which of the following IP addresses is a valid IP address for a host on a public network? - 142.15.6.1 9 - Which of the following are private IP addresses? 10.244.12.16 AND 192.168.250.11 10 - Which of the following devices is most likely to be assigned a public IP address? - A router that connects your home network to the internet. 4.2.8 1 - Your network has a network address of 172.17.0.0 with a subnet mask of 255.255.255.0. Which of the following are true concerning this network? - 172.17.0.255 is the network broadcast address. AND 254 IP addresses can be assigned to host devices. 2 - You have two subnets on your private network, one with a 20-bit mask, and another with a 22-bit mask. How many available host addresses are there on each subnet? 1022 AND 4094 3 - You have a small network with three subnets as shown in the exhibit. IP addresses for each router interface are also indicated in the exhibit. How many IP addresses on each subnet remain that can be assigned to hosts? SubnetA = 125, SubnetB = 0, SubnetC = 13 4 –

5 - You have a network address of 132.66.0.0 and a subnet mask of 255.255.224.0. Which four of the following are valid subnet addresses? - 132.66.192.0 AND 132.66.96.0 AND 132.66.0.0 AND 132.66.224.0 6 - You have a network address of 201.79.187.0 and a subnet mask of 255.255.255.192. Which three of the following are valid host addresses for subnet 201.79.187.128? - 201.79.187.166 AND 201.79.187.189 AND 201.79.187.132 7 - While calculating how many subnets are available for a given IP address and subnet mask, when should you use the 2^n - 2 formula? - The network uses a classful routing protocol, such as RIP version 1 or IGRP. AND The no ip subnet zero command is configured. 8 - You have a network address of 202.200.55.0 with a subnet mask of 255.255.255.224. Which of the following is the broadcast address for subnet 202.200.55.96? - 202.200.55.127 9 - Your network has been assigned 168.11.0.0 as the network address. You have determined that you need 70 subnets. Which subnet mask value should you select to provide 70 subnets? – 255.255.254.0

10 - You need to connect a router to a subnet. The subnet uses the IP address 192.168.12.0/26. You are instructed to assign the last IP address on the subnet to the router. Which IP address will you use? 192.168.12.62 4.3.4 In this lab, your task is to subnet the 172.30.0.0/24 network to provide sufficient host addresses for both subnets while minimizing wasted IP addresses.  Use a 26-bit subnet mask on both subnets. Although there will be wasted bits for the subnet connected to FastEthernet0/0, /26 is the smallest subnet mask that will work for both subnets.  Configure the IP address on the two router interfaces as follows: o For FastEthernet0/0, use the first possible subnet and the last address on the subnet. o For FastEthernet0/1, use the fourth possible subnet and the last address on the subnet.  Enable both interfaces.  Save your changes to the startup-config file. Complete this lab as follows: 1. Select ATLANTA . 2. Press Enter to get started. 3. At the ATLANTA> prompt, type enable and press Enter . 4. At the ATLANTA# prompt, type configure terminal and press Enter . 5. At the ATLANTA(config)# prompt, type interface FastEthernet0/0 and press Enter . 6. At the ATLANTA(config-if)# prompt, type ip address 172.30.0.62 255.255.255.192 and press Enter . 7. At the ATLANTA(config-if)# prompt, type no shutdown and press Enter . 8. At the ATLANTA(config-if)# prompt, type interface FastEthernet0/1 and press Enter . 9. At the ATLANTA(config-if)# prompt, type ip address 172.30.0.254 255.255.255.192 and press Enter . 10. At the ATLANTA(config-if)# prompt, type no shutdown and press Enter . 11. At the ATLANTA(config-if)# prompt, type exit and press Enter . 12. At the ATLANTA(config)# prompt, type exit and press Enter . 13. Save your changes to the startup-config file. a. At the ATLANTA# prompt, type copy run start and press Enter . b. Press Enter to begin building the configuration. 4.3.5

In this lab, your task is to subnet the 172.16.0.0 network to provide sufficient host addresses for both subnets while minimizing wasted IP addresses.  Choose one subnet mask for each subnet. The masks should provide enough host addresses without wasting IP addresses.  Assign IP addresses and correct subnet masks to the SFO interfaces connected to the switches in this order: o For FastEthernet0/0, use the second possible subnet and the last address on the subnet. o For FastEthernet0/1, use the next available subnet that does not overlap and the last address on the subnet.  Enable both interfaces.  Save your changes to the startup-config file. Complete this lab as follows: 1. Select SFO . 2. Press Enter to get started. 3. At the SFO> prompt, type enable and press Enter . 4. At the SFO# prompt, type configure terminal and press Enter . 5. At the SFO(config)# prompt, type interface FastEthernet0/0 and press Enter . 6. At the SFO(config-if)# prompt, type ip address 172.16.15.254 255.255.248.0 and press Enter . 7. At the SFO(config-if)# prompt, type no shutdown and press Enter . 8. At the SFO(config-if)# prompt, type interface FastEthernet0/1 and press Enter . 9. At the SFO(config-if)# prompt, type ip address 172.16.17.254 255.255.254.0 and press Enter . 10. At the SFO(config-if)# prompt, type no shutdown and press Enter . 11. At the SFO(config-if)# prompt, type exit and press Enter . 12. At the SFO(config)# prompt, type exit and press Enter . 13. Save your changes to the startup-config file. a. At the SFO# prompt, type copy run start and press Enter . b. Press Enter to begin building the configuration. 4.3.6 1 - You are configuring a network and have been assigned the network address of 221.12.12.0. You want to subnet the network to allow 5 subnets with 20 hosts per subnet. Which subnet mask should you use? 255.255.255.224 2 - ou have a single router with three subnets as shown. Each subnet has the number of hosts specified.

You need to select a subnet mask for each subnet that provides sufficient host addresses without wasting addresses.  Which mask values should you use? SubnetA = 255.255.255.192  SubnetB = 255.255.255.224  SubnetC = 255.255.255.128 3 - You need to design a network that supports 275 hosts. You want to place all hosts in a single broadcast domain, and you want to make sure you do not waste IP addresses. How should you implement your plan? Place all hosts on the same subnet. Use a mask of 255.255.254.0. 4 - You have a network with two routers as shown. You need to choose subnet addresses for subnets 1 and 2. Which of the following subnets would you use? 172.30.12.0/28 AND 172.30.12.128/26 5 - You have a small network with three subnets as shown. IP addresses for each router interface are also indicated. You need to connect Wrk1_A to SubnetA and Wrk5_C to SubnetC. Which IP addresses should you use? Wrk1_A = 192.168.111.62 AND Wrk5_C = 10.155.64.97 6 - Your client has a class B network address and needs to support 500 hosts on as many subnets as possible. Which subnet mask should you recommend? 255.255.254.0 7 - You have a network address of 133.233.11.0 and a subnet mask of 255.255.255.240. How many assignable host addresses are on each subnet? 14 8 - You have been assigned the IP address of 197.177.25.0 for your network. You have determined that you need five subnets to allow future growth. What subnet mask value would you use? 255.255.255.224 9 - You have a network address of 132.66.0.0 and a subnet mask of 255.255.254.0. How many possible host addresses are on each subnet, excluding host addresses of all 1s and all 0s? 510 10 - You have a network address of 220.16.22.0 and have selected 255.255.255.224 as the subnet mask value. How many possible subnets are there? eight

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