Network Layer: Chapter 6

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What are two functions that are provided by the network layer? (Choose two.)
providing end devices with a unique network identifier

directing data packets to destination hosts on other networks
Which key combination allows a user to abort setup mode?
ctrl+c
Within a production network, what is the purpose of configuring a switch with a default gateway address?
The default gateway address is used to forward packets originating from the switch to remote networks
Which value, that is contained in an IPv4 header field, is decremented by each router that receives a packet?
Time-to-live
What is the command netstat -r used for?
to display the host routing table
Refer to the exhibit. Using the network in the exhibit, what would be the default gateway address for host A in the 192.133.219.0 network?
192.133.219.1
Which feature on a Cisco router permits the forwarding of traffic for which there is no specific route?
gateway of last resort
Which router bootup sequence is correct?​
1 - perform the POST and load the bootstrap program
2 - locate and load the Cisco IOS software
3 - locate and load the startup configuration file or enter setup mode
Which two files are loaded into RAM by the router when it boots? (Choose two.)
startup configuration
IOS image
Which portion of the network layer address does a router use to forward packets?
network portion
How does the network layer use the MTU value?
The MTU is passed to the network layer by the data link layer
During the boot process, where will the router bootstrap program look for the IOS image by default?
flash
During troubleshooting procedures, from which location will most Cisco routers load a limited IOS?
ROM
Open the PT activity. Perform the tasks in the activity instructions and then answer the question.
Which interfaces in each router are active and operational?
...
A packet leaving PC-1 has to traverse __________ hops to reach PC-4.​
3
The acronym ______ is used to define the process that allows multiple devices to share a single routable IP address.
...
A router may have to fragment a packet when forwarding it from one medium to another medium that has a smaller _________.
...
If there are two or more possible routes to the same destination, the ______ is used to determine which route is used in the routing table.
longest match
Which IPv4 address can a host use to ping the loopback interface?
127.0.0.1
A packet arrives at a router interface. The router goes through a series of steps to determine where the packet should be forwarded. Place the steps of the router forwarding process in the correct order. (Not all options are used.)
1 -> examine packet header

2 -> determine destination network

3 -> examine routing table

4 -> identify exit interface to destination from route entry

5 -> move packet to forwarding interface
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