Computer Networking
What is the main reason the OSI model was created?

So Cisco could use the model.
To create a layered model larger than the DoD model.
So different networks could communicate.
So application developers can change only one layer's protocols at a time.

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Computer Networking
Two connected routers are configured with RIP routing. What will be the result when a router receives a routing update that contains a higher-cost path to a network already in its routing table?

They will all load-balance.
The update will be ignored and no further action will occur.
The updated information will be added to the existing routing table.
The updated information will replace the existing routing table entry.
The existing routing table entry will be deleted from the routing table and all routers will exchange routing updates to reach convergence.

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Computer Networking
The fundamental requirements of private-to-public network interconnection methods which need to be provided in gateways is/are

None of these
adequate cost control mechanisms for administration of the private networks
to assign address to private network DTEs
universal accessibility for private network Data Terminal Equipment (DTE)
A and B both

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Computer Networking
The MAC (Media Access Control) address of the network card is used in both Ethernet and Token-Ring networks and is essential for communication. What does MAC provide?

A physical address that is randomly assigned each time the computer is started
A logical address that identifies the workstation
An alias for the computer name
The logical domain address for the workstation
A physical address that is assigned by the manufacturer

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Computer Networking
The Internet Control Message Protocol (ICMP)

provides communication between the Internet Protocol Software on one machine and the Internet Protocol Software on another
All of these
None of these
allows gateways to send error a control messages to other gateways or hosts
reports error conditions to the original source, the source must relate errors to individual application programs and take action to correct the problem

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