Chapter 6

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6.1.6 1 - Which of the following best describes how a router operates to transmit messages to different LAN segments? The router reads the LAN segment address contained in the message and consults the appropriate routing table for the protocol, then forwards the message to the appropriate LAN segment. 2 - Which of the following statements about routers are true? They use logical network and device addresses to route data between networks. AND They examine the destination device address contained in packets to make routing decisions. 3 - How does a router use frames to route data through a network? The router checks the MAC address in the frame, replaces the MAC address of the source with its own MAC address, and sends it to the proper host. 4 - Which processes does Cisco express forwarding (CEF) use to optimize packet processing through a router? Organizes routing data in the forwarding information base (FIB). AND Maintains adjacency tables. 5 - Which internal routing logic organizes routing data using a tree structure, which allows very fast searches and requires less time to route packets? Cisco express forwarding 6 - You are designing a routing solution for your organization. You want to improve routing efficiency by ensuring that routers save frequently used data link headers to encapsulate packets. Which types of routing logic could you implement? Cisco express forwarding AND Fast Switching 7 - Which Cisco express forwarding mechanism maintains Layer 2 information linked to a particular entry in the routing table, reducing the need to send ARP requests before forwarding packets? Adjacency tables 8 - Match each default administrative distance with the correct route type.
9 - Which of the following best describes a hop count? The number of routers needed to get to the destination network. 10 - The administrative distance determines the trustworthiness of the route source. Assuming that two separate routes are available to the same location, the router will use the following criteria for choosing between these routes. Put the criteria in order. 6.2.5 In this lab, your task is to: Configure a static route to 10.0.0.0/8 network.
Configure a default route to the internet. 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 ip route 10.0.0.0 255.0.0.0 172.17.12.98 and press Enter . 6. At the SFO(config)# prompt, type ip route 0.0.0.0 0.0.0.0 160.12.99.1 and press Enter . 7. At the SFO(config)# prompt, type exit and press Enter . 8. At the SFO# prompt, type copy run start and press Enter . 9. Press Enter to begin building the configuration. 6.2.6 1 - Match each routing method on the left with its associated characteristics on the right. Each routing method may be used once, more than once, or not at all. 2 - If you have one router on your network and the IP address doesn't match one of the devices on your network, where would the default static route direct packets?
To your Internet Service Provider 3 - Which of the following is a disadvantage of static routing? Require more configuration time 4 - Match each route types with its description. 5 - You have issued the following command on your router: Router(config)#ip route 202.22.12.0 255.255.255.0 192.168.1.1 Which of the following are configured by the parameters in this command? A route to network 202.22.12.0 is added. AND The next hop router address is 192.168.1.1. 6 - You are the administrator of the network shown. You want to configure the stub network located in Tampa to forward packets to Chicago, but you do not want the overhead associated with a routing protocol. Which of the following will accomplish your goal? Tampa(config)# ip route 0.0.0.0 0.0.0.0 182.1.48.3 Chicago(config)# ip route 182.1.48.0 255.255.240.0 182.1.48.4 Chicago(config)# ip route 192.168.112.128 255.255.255.248 182.1.48.4 7 - You need to configure a static route on your Cisco router. The destination network is 192.65.178.0 with a subnet mask of 255.255.255.0. The default gateway is 192.65.179.1, and the IP address of the destination host for the message is 192.65.178.15. Which of the following commands configures this route? ip route 192.65.178.0 255.255.255.0 192.65.179.1 8 - You have a small network as shown. You want to configure a route so that packets sent to any non-directly connected network get sent to RouterB. Which command would you use?
ip route 0.0.0.0 0.0.0.0 192.168.4.14 9 - You have a small network as shown. You have configured RIP on both RouterA and RouterB. The show ip route command on RouterA shows the following information: Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route Gateway of last resort is not set R 10.0.0.0/8 [120/1] via 192.168.4.14, 00:00:02, Serial0/1/0 C 192.168.1.0/24 is directly connected, FastEthernet0/0 192.168.4.0/30 is subnetted, 1 subnets C 192.168.4.12 is directly connected, Serial0/1/0 You want to configure a default route so that all packets for unknown networks are sent to RouterB. Which command should you use? ip default-network 10.0.0.0 10 - You have a small network as shown. You have configured RIP on both RouterA and RouterB. The show ip route command on RouterA shows the following information: Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route Gateway of last resort is not set R 10.0.0.0/8 [120/1] via 192.168.4.2, 00:00:02, FastEthernet0/1 C 192.168.1.0/24 is directly connected, FastEthernet0/0 C* 192.168.4.0/24 is directly connected, FastEthernet0/1 C 192.168.2.0/24 is directly connected, FastEthernet0/2 RouterA receives a packet addressed to 172.16.0.1. What will RouterA do with the packet? Drop the packet.
6.3.9 Lab Questions Q1Which network is not directly connected to the SFO router? Your answer: 192.168.129.0 Correct answer: 192.168.129.0 Q2The SFO router has a packet to send to host 192.168.127.12. What is the address of the next hop router in the path? Your answer: 10.10.0.2 Correct answer: 10.10.0.2 Q3The SFO router receives a packet addressed to host 192.168.130.155. Through which interface will SFO send out the packet? Your answer: FastEthernet0/1 Correct answer: FastEthernet0/1 Q4How many hops away is network 192.168.64.0 from SFO? Your answer: 1 Correct answer: 1 Explanation In this lab, your task is to use the show ip route command to find out the following: 1. 192.168.129.0 is the only network that is not directly connected to SFO. Directly connected networks are labeled with a C. 192.168.129.0 is a route learned through RIP and is designated with the letter R, as in the following line: R 192.168.127.0/24 [120/1] via 10.10.0.2, 00:00:05, Serial0/0/0. 2. 10.10.0.2 is the address of the next hop router when SFO sends a packet to host 192.168.127.12. To find this information, locate the destination network (192.168.127.0). The address of the next hop router is indicated by the address following via for the route: R 192.168.127.0/24 [120/1] via 10.10.0.2, 00:00:05, Serial0/0/0./li> 3. FastEthernet0/1 is the SFO interface used to send packets to hosts in the 192.168.130.0 network. To find this information, locate the destination network (192.168.130.0). The last item in the routing table indicates the interface used to reach the destination network as in the following line: C 192.168.130.0/24 is directly connected, FastEthernet0/1. 4. One hops exist between the 192.168.64.0 network and the SFO router. To find this information, look for the entry for network 192.168.64.0. The second number in brackets [120/1] indicates the hop count. The first number (120) is the administrative distance. 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 show ip route and press Enter .
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