Computer Networking
You want to create a standard access list that denies the subnet of the following host: 172.16.50.172/20. Which of the following would you start your list with?

access-list 10 deny 172.16.64.0 0.0.31.255
access-list 10 deny 172.16.48.0 0.0.15.255
access-list 10 deny 172.16.0.0 0.0.255.255
access-list 10 deny 172.16.48.0 255.255.240.0

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Computer Networking
Parity bit is

an error-detecting code based on a summation operation performed on the bits to be checked.
a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and
a check bit appended to an array of binary digits to make the sum of all the binary digits.
the ratio of the number of data units in error to the total number of data units
None of these

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Computer Networking
You get a call from a network administrator who tells you that he typed the following into his router:Router (config) #router ospf 1Router (config-router) #network 10.0.0.0 255.0.0.0 area 0He tells you he still can't see any routes in the routing table. What configuration error did the administrator make?

The wildcard mask is incorrect.
The AS configuration is wrong.
The OSPF area is wrong.
The OSPF Process ID is incorrect.

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