ccna troubleshoot quiz

[Phrass]

Your customer uses private network 10.0.0.0/20 throughout his domain. The business presently has 450 offices and 200 computers per office.

What technique is necessary in order for all internal network users to have simultaneous access to the Internet through the single company firewall and the service provider's frame relay network?

a. CIDR

b. VLSM

c. NAT

d. PAT

give an answer along with reasons for your answer because i need to understand it.

[dark_kammealeon]

NAT

Network Address Translation (NAT, also known as Network Masquerading, Native Address Translation or IP Masquerading) is a technique of transceiving network traffic through a router that involves re-writing the source and/or destination IP addresses and usually also the TCP/UDP port numbers of IP packets as they pass through. Checksums (both IP and TCP/UDP) must also be rewritten to take account of the changes. Most systems using NAT do so in order to enable multiple hosts on a private network to access the Internet using a single public IP address (see gateway). Many network administrators find NAT a convenient technique and use it widely. Nonetheless, NAT can introduce complications in communication between hosts and may have a performance impact.

[bugsy]

NATing suggest one to one mapping meaning one private to one public however with PAT you translate many private to one public .I think PAT is the right answer ohhh BTW means Port address translation .Look it up for details on how it works I am too lazy to type it out.

[Jack Frost]

NATing suggest one to one mapping meaning one private to one public however with PAT you translate many private to one public .I think PAT is the right answer ohhh BTW means Port address translation .Look it up for details on how it works I am too lazy to type it out.

http://www.webopedia.com/DidYouKnow/...AT_and_PAT.asp

[Gnostic]

simultaneous being the key word here.