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Simple Mail Transfer Protocol

What is the major disadvantage of a star topology?

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Which standar does IEE 802.4 define ?

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What is firewalls?

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Which command causes in.named to increase its debug level by 1 ?

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System used to deliver mail between domains running different mail protocols is called ?

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What IP network addresses are set-aside for class B (for private use)? a. 128.0.0.0 (mask 255.255.0.0) b. 128.252.0.0 (mask 255.255.0.0) c. 172.16.0.0 (mask 255.240.0.0) d. 172.16.0.0 (mask 255.255.0.0) e. 172.240.0.0 (mask 255.255.0.0)

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Define 10base-t?

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T/F: 802.3 can not "see" upper layers.

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details on VMware

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Which topology, uses centralized hub from which a number of signals carrying cables goes out to individual devices on the branch.

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What is a device that amplifies and regenerates the data signal bit by bit.

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I am using windows server 2008 and its working as DHCP server. 100 clients are connected to this server. All clients are accessing Internet. But I wanna to block some specific websites which is not required by client. So how it can be done through DHCP server? is there any third party software available ? or any other method you know then please answer it.

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