Computer Networking
A group of 2m - 1 routers are interconnected in a centralized binary tree, with router at each tree node. Router I communicate with router J by sending a message to the root of the tree. The root then sends the message back down to J. Then find the mean router-router path length.

2 (2m - 1)
(2m - l)/mJ
2 (m - 2)
m - 1

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Computer Networking
If you wanted to deny all Telnet connections to only network 192.168.10.0, which command could you use?

access-list 100 deny tcp 192.168.10.0 255.255.255.0 eq telnet
access-list 100 deny tcp any 192.168.10.0 0.0.0.255 eq 23
access-list 100 deny 192.168.10.0 0.0.0.255 any eq 23
access-list 100 deny tcp 192.168.10.0 0.255.255.255 eq telnet

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Computer Networking
Two computers that communicate with each other use a simple parity check to detect errors for ASCII transmissions. Which of the following events will always lead to an undeleted error?

None of these
one bit or any odd number of bits inverted in a byte during transmission
two bits or any even number of bits inverted in a byte during transmission
two bits or any even number of bits inverted in a block during transmission
one bit or any odd number of bits inverted in a block of data during transmission

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