Network+ QOTW - 16/Jan/2006

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What is a Benefit of using a Proxy Server?

A) It increases the requirements for bandwidth on the Internet connection

B) Automated access to the Internet for workstations

C) Prevents the workstations IP address from being seen externally

D) It automatically assigns IP addresses to users





Good Luck, and once again please use the Hide tags to prevent influencing others in their decisions.

 

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I'll go for
[HIDE]C[/HIDE]

 

[HIDE]I'll go for C please Si[/HIDE]

 

[hide]C methinks[/hide]

 

[HIDE]stuck between B and C[/HIDE]

[HIDE]Err B?[/HIDE]

 

[hide]i'll have a C please.[/hide]

 

My answer for this one is [HIDE]C[/HIDE]

Harry.

 

[HIDE]um, C, hides IP?[/HIDE]

 

[HIDE]C for me, Si [/HIDE]

 

oooh, we have a 100% Hide Tags record so far - can we go the whole thread ?

 

[HIDE]

A) It increases the requirements for bandwidth on the Internet connection

Wrong - it decreases the use of bandwidth.

B) Automated access to the Internet for workstations

Yes, true if the workstations are set to auto-discover a proxy server and the proper WPAD entries are configured in DHCP/DNS

C) Prevents the workstations IP address from being seen externally

This is more a function of PAT/NAT but if the Proxy server had a public IP on it's external NIC this would be a true statement.

D) It automatically assigns IP addresses to users

That is what DHCP and APIPA do lol.




[/HIDE]

 

Well done to everyone who said C.

A proxy prevents local IP addresses from being seen externally, although as Bluerinse rightly points out this is a form of NAT / PAT.

It is worth mentioning, although not mentioned by the question, that Proxy servers are also regullarly used for the Caching of frequently visited web pages.

 

WPAD = "Windows proxy automatic discovery"

So what did you think of my answer to B?

 

does it not also assign ip addresses as well, to disguise them ???
I got the answer right tho by the way

 

Assigning IP addresses or to use the correct term Leasing IP address, is handled by a DHCP (Dynamic Host Configuration Protocol) server. It is possible to have the DHCP server running on the same box as a Proxy server but they are in effect two separate functions.

 

I actualy thought that could have been the correct answer when I first read the question, however, as you say, the PC's need to be manually configured to automatically detect a Proxy.

 

No Simon, I am saying it can be done automatically using a WPAD entry in DNS or it can even be done using DHCP. It is a scope option. There is no configuration necessary on the client. I think the auto discovery option is ticked by default.

 

Ahh! Got ya!