Cisco ICND1 Section 3 IP Routing (A+ Guaranteed)

1. How does Cisco IOS Software designate a subnet in the routing table as a directly connected network? What about a route learned with RIP? correct answers 1. Answer: The show ip route command lists routes with a designator on the left side of the command output. C represents connected routes, I is used for IGRP, and R represents routes derived from RIP. 2. Imagine that a router has an interface E0 with IP address 168.10.1.1 and an interface E1 with IP address 10.1.1.1. If the commands router rip and network 10.0.0.0, with no other network commands, are configured in the router, does RIP send updates out E0? correct answers 2. Answer: No. There must be a network statement for network 168.10.0.0 before RIP advertises out that interface. The network command simply selects the connected interfaces on which to send and receive updates. 3. Which command lists all the IP routes learned via RIP? correct answers 3. Answer: The show ip route rip command lists only RIP-learned routes. 4. Which command or commands list all IP routes in network 172.16.0.0? correct answers 4. Answer: The show ip route 172.16.0.0 command lists all the routes in 172.16.0.0. Also, the show ip route list 1 command lists routes in network 172.16.0.0 assuming that the access-list 1 permit 172.16.0.0 0.0.255.255 configuration command also exists. 5. What are the primary purposes of Flash memory in a Cisco router? correct answers 5. Answer: To store Cisco IOS and microcode files. If microcode is upgraded, the files also reside in Flash memory. 6. What is the main purpose of ROM in a Cisco router? correct answers 6. Answer: To store a small, limited-function version of IOS and to store bootstrap code. Typically, this type of IOS is used only during maintenance or emergencies. 7. What configuration command would be needed to cause a router to use a Cisco IOS image named on TFTP server 128.1.1.1 when the router is reloaded? If you forgot the first parameter of this command, what steps must you take to learn the correct parameters and add the command to the configuration? (Assume that you are not logged in to the router when you start.) correct answers 7. Answer: boot system tftp 128.1.1.1 As for the second part of the question: Log in from con/aux/telnet, type the enable command, type the enable password, type the configure terminal command, and type boot ?. Help appears for the first parameter of the boot command. 8. What two methods could a router administrator use to cause a router to load IOS stored in ROM? correct answers 8. Answer: Set the configuration register boot field to binary 0001, or add boot system rom to the configuration file and copy it to the startup configuration file. To set the configuration register to hex 2101, which would yield binary 0001 in the boot field, the config-register 0x2101 global configuration command would be used. A third method is to remove the Flash memory in a router and then reload the router.