640-821 Question

[Patchste]

Hello

I got a question of my 640-821 exam which asked

Which port can be used for a WAN T1 connection?
Answer could be AUI BRI Console Serial

I selected serial but my friend reckons it is BRI.

Can anyone help?

I failed the exam by 2 questions so I am trying to eliminate the wrong ones.

Thanks

Patchste

 

[gwildfire]

The answer is indeed serial, bri is for an ISDN 64K connection. T-1 can either be on a serial interface such as a Wic-1T (althought this is T1 Speed CCT not RAW T1)or on a T1 PRI interface. Perhaps the other answer was PRI and not BRI?

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[wabob]

The correct answer is serial.

An ISDN BRI circuit can be used for WAN (usually as a backup connection) but is only 144 Kbps and connects to the router via an RJ45 connector.

A T1 circuit is 1.544 Mbps and will connect to a CSU/DSU.
The CSU/DSU will then connect to the router via a DB60 serial connector or a "Smart Serial" connector.

Hope this helps...

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