Term
| What are the primary responsibilities of the router? |
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Definition
| Determine the best path to send packets Forwarding packets to their destination |
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Term
| What are the five standards supported by serial connections? |
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Definition
| EIA/TIA-232, EIA/TIA-449, V.35, X.21, and EIA/TIA-530 |
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Term
| When will static routes and dynamic routes be added to the routing table? |
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Definition
| After the exit interfaces are configured. |
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Term
| What command will show the status and gives a detailed description for all interfaces on the router? |
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Definition
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Term
| What does the adminstratively down output mean? |
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Definition
| that the interface is currently in the shutdown mode, or turned off. |
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Term
| What does the line output mean? |
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Definition
| That the interface is not receiving a carrier signal. |
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Term
| What does the show ip interfaces brief command list? |
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Definition
| See a portion of the interface information in a condensed format. |
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Term
| Why is show ip interfaces brief command better than the show running config to see if the state of the interfaces? |
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Definition
| To quickly verify that the interfaces are up and line protocol up. |
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Term
| What is the default state of router interfaces? |
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Definition
|
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Term
| What are the commands and prompt to enable an interface? |
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Definition
R1(config)#interface fa0/0
R1(config-if)#ip address subnet mask
R1(config-if)#no shutdown |
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Term
| Even after configuring an interface, what must be received by the interface to change the state to up? |
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Definition
|
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Term
| What command will stop the messages returned by IOS not to interfere with your typing? |
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Definition
| R1(config-line)#logging synchronous |
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Term
| What does a C mena in the output of show ip route? |
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Definition
| Directly connected network |
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Term
| What types of addresses are seen in the routing table? |
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Definition
|
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Term
| What must be true for the network of each interface on a router? |
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Definition
| Each interface must belong to a separate subnet. |
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Term
| What is the default gateway for LAN |
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Definition
|
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Term
| What does a device send if it does not have the IP address in its ARP table? |
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Definition
|
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Term
| What are the commands to configure a serial interface? |
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Definition
R1(config)#interface serial0/0/0
R1(config-if)#ip address subnet mask
R1(config-if)#no shutdown |
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Term
| Why may a serial interface still be down after it has been configured? |
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Definition
| The other end needs to be configured. |
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Term
| After the othe end of the connection is configured, why is the line protocol down? |
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Definition
| the clock rate needs to be set. |
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Term
| What end of a serial connection is the service provider? |
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Definition
|
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Term
| What end of the serial connection is the router by default? |
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Definition
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Term
| What device is used to convert the data from the router into a form acceptable to the WAN service provider? |
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Definition
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Term
| What do serial interfaces require to control the timing of communication? |
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Definition
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Term
| What command will tell you which type of cable is connected to the interface? |
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Definition
|
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Term
| What command will show the staus of the interfaces? |
|
Definition
R1#show interfaces
R1#show ip interface brief |
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Term
| What is the second test to see if the interface is operational? |
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Definition
| Ping the remote interface. |
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Term
| What command will show you all the commands that have been configured on the router? |
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Definition
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Term
| What is the purpose of the routing table? |
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Definition
| Provide the router with paths to different destination netowrks. |
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Term
| What does the debug command show? |
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Definition
| See any changes that the router performs when adding or removing routes. |
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Term
| What debug command will show you as networks are connected? |
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Definition
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Term
| What command is used to turn off debug command? |
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Definition
R1#undebug ip routing
R1#undebug all |
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Term
| What two commands are used to remove a directly connected network? |
|
Definition
R1(config)#shutdown
R1(config)#no ip address |
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Term
| What is the crucial step in configuring your network? |
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Definition
| Verify that all interfaces are up and up and that the routing tables are complete. |
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Term
| What two commands should you use before you continue with more complex configurations? |
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Definition
R1#show ip interface brief
R1#show ip route |
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Term
| What does a failed ping display? |
|
Definition
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Term
| What is the networking monitoring and troubleshooting tool used in this section? |
|
Definition
Cisco Discovery Protocol
(CDP) |
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Term
| Which device will information be gathered about? |
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Definition
| Directly connected Cisco devices. |
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Term
| What information is contained in the advertisements? |
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Definition
| Type of devices that are connected, the router interfaces that are connected to, the interfaces used to make the connections, and model number of devices. |
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Term
| At Layer 3, what do routing protocols consider neighbors? |
|
Definition
| Considers neighbors to be devices that share the same network address space. |
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Term
| What Layer does CDP operate at? |
|
Definition
|
|
Term
| Describe Cisco CDP neighbors? |
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Definition
| Cisco devices that are directly connected physically and share the same data link. |
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|
Term
| What are the commands to display CDP information? |
|
Definition
R1#show cdp neighbors
R1#show cdp neighbors detail |
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|
Term
| What is the default setting for CDP? |
|
Definition
|
|
Term
| What are the 5 types of information that CDP provides information about? |
|
Definition
-Device identifiers
-Address list
-Port identifier
-Capabilities list
-Platform |
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Term
| What information is displayed after issuing the show cdp neighbors command? |
|
Definition
-Neighbor device ID
-Local interface
-Holdtime value
-Neighbor device capability code
-Neighbor hardware platform
-Neighbor remote port |
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|
Term
| What information can be gathered if you telnet to a neighboring device? |
|
Definition
| Directly connected Cisco devices. Also you can build a logical topology. |
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|
Term
| Can CDP be a security risk? |
|
Definition
|
|
Term
| What command can be used to shut off CDP on a router? |
|
Definition
|
|
Term
| What command can be use to shut off CDP on an interface? |
|
Definition
| R1(config-if)#no cdp enable |
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|
Term
| What are the two ways a router can learn about remote networks? |
|
Definition
| Manually, from configured static routes or, automatically from a dynamic route. |
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|
Term
|
Definition
| Network that can only be accessed by a single route. |
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|
Term
| When are static routes used? |
|
Definition
| When routing from a network to stub network. |
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Term
| Why would dynamic routing be a waste of resources for a stub route? |
|
Definition
| There is only one way out for sending non-local traffic. |
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|
Term
| What are the 2 commands to verify static routes? |
|
Definition
R1#show ip route
R1#show running-config |
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|
Term
| What is recommended to do after entering and verifying the static routes? |
|
Definition
Save configuration to NVRAM
R1#copy running-config startup-config |
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|
Term
| What does principle 1 define about where a router looks to forward packets? |
|
Definition
| Every router makes its decision alone, based on the information it has in its own routing table. |
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Term
| What does principle 2 define about what other routers routing tables contain? |
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Definition
| The fact that one router has certain information in tis routing table does not mean that other routers have the same information. |
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Term
| What does principle 3 state about the return route of a packet? |
|
Definition
| Routing info about a path from one network to another does not provide routing info about the reverse, or return path. |
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|
Term
| Before the router forwards a packet, what must be determined? |
|
Definition
| The exit interface to use to forward the packet. |
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|
Term
| List two steps that the router uses to froward a packet? |
|
Definition
-Find a route
-Find an exit interface |
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|
Term
| When a router has to perform multiple lookups in the routing table before forwarding a packet, what is the process called? |
|
Definition
|
|
Term
| How can a static route be entered to stop the recursive lookup process? |
|
Definition
|
|
Term
| What happens to the static route if the exit interface goes down? |
|
Definition
| The static route is removed |
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|
Term
| What is the command to remove the static route with the next hop ip address? |
|
Definition
| R1(config)#no ip route [ip address] [subnet mask] [next hop ip] |
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|
Term
| What is the command to enter a static route using an exit interface? |
|
Definition
| R1(config)#ip route [ip address] [subnet mask] [exit interface] |
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|
Term
| What are the reasons to modify a static route? |
|
Definition
| The destination network no longer exists. There is a change in the topology. |
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|
Term
| Can a static route be directly modified? |
|
Definition
| No, the static route must be deleted and a new one configured. |
|
|
Term
| What is the most efficient way to enter a static route? |
|
Definition
|
|
Term
| What are the three commands listed to verify static route configuration? |
|
Definition
| show running-config, show ip route, ping |
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|
Term
| Why does making a routing table smaller improve the efficiency of the router? |
|
Definition
| Makes the routing table more efficient. |
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|
Term
| What are the 2 rules on when a static route can be summarized? |
|
Definition
-The destination networks can be summarized into a single network.
-The multiple static routes all use the same exit interface or next hop ip address. |
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|
Term
| If two routes in the routing table match the packet, which route will the router choose? |
|
Definition
| The match that is most specific. |
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|
Term
| What is a default static route? |
|
Definition
| It is a route that will match all packets. |
|
|
Term
| What is the ip address and subnet mask for quad-zero? |
|
Definition
|
|
Term
| What does the * mean next to the S in the routing table? |
|
Definition
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