Computer Networking
X.21 is

None of these
a method of determining which device has access to the transmission medium at any time
a very common bit-oriented data link protocol issued by ISO
a method access control technique for multiple-access transmission media
network access standard for connecting stations to a circuit-switched network

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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?

The updated information will be added to the existing routing table.
The updated information will replace the existing routing table entry.
The update will be ignored and no further action will occur.
They will all load-balance.
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
Terminals are used to

collect data from the physical system
None of these
provide information for the manager
communicate management decisions to the physical system
All of these

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