READ Free Dumps For Cisco- 100-101
| Question ID 6409 | In the configuration of NAT, what does the keyword overload signify?g
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| Option A | When bandwidth is insufficient, some hosts will not be allowed to access network translation
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| Option B | The pool of IP addresses has been exhausted.w
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| Option C | Multiple internal hosts will use one IP address to access external network resources.g
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| Option D | . If the number of available IP addresses is exceeded, excess traffic will use the specified address pool.
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| Correct Answer | c |
Explanation http://evilrouters.net/2009/07/09/configuring-basic-nat-with-overloading/ http://www.gratisexam.com/ Overloading (having multiple clients all NAT'd to the same IP address) is probably the most common implementation (especially for those of us who run NAT on a Cisco box at home!). The keyword “overload†specifies we are using NAT Overload (PAT) in which multiple internal hosts will use only one IP address to access external network resourcesg
| Question ID 6410 | What happens when computers on a private network attempt to connect to the Internet through a Cisco router running PAT?a
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| Option A | A. The router uses the same IP address but a different TCP source port number for each connection
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| Option B | An IP address is assigned based on the priority of the computer requesting the connection
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| Option C | The router selects an address from a pool of one-to-one address mappings held in the lookup tablea
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| Option D | . The router assigns a unique IP address from a pool of legally registered addresses for the duration of the connection
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| Correct Answer | a |
Explanation Port Address Translation (PAT) can support thousands of users connect to the Internet using only one real global IP address. With PAT, each computer will be assigned a separate port number so that the router can identify which computer should receive the return traffic. Reference: http://www.cisco.com/en/US/docs/security/asa/asa82/configuration/guide/nat_staticpat.html Static PAT translations allow a specific UDP or TCP port on a global address to be translated to a specific port on a local address. That is, both the address and the port numbers are translated. Static PAT is the same as static NAT, except that it enables you to specify the protocol (TCP or UDP) and port for the real and mapped addresses. Static PAT enables you to identify the same mapped address across many different static statements, provided that the port is different for each statement. You cannot use the same mapped address for multiple static NAT statements. Port Address Translation makes the PC connect to the Internet but using different TCP source port