Cisco Questions - Tonight Please

[bbarnes]

Which of the following encapsulation types is associated with synchronous serial lines?
A. PPP
B. HDLC --- Think this is the answer (2.4.3 of Sem4 curriculum)
C. frame relay
D.all of these

What encapsulation type would you select for a link if speed were the most important?
A. frame relay
B. PPP
C. HDLC --- fairly sure this is it
D. SLIP

The WAN path between DTEs is known as what?
A. The link
B. The circuit
C. The channel
D. All of the above --- Answer (100% sure - found in Cisco curriculum)

 

[ScottMac]

If I had to throw a dart, I'd say D C B.

FWIW

Scott

 

[pcmark]

I'd say
D
C
B makes the most sense, but I've heard link and circuit interchanged

 

[spidey07]

very misleading questions.

#1 - All answers are correct, but I would have picked A and B
#2 - A is the correct answer. Frame-relay has only a two byte frame header, much more efficient than the rest therefore "faster"
#3 - A and B in real life, D is the cisco answer I guess.

hope this helps, looks like they want cisco answer.

 

[Daniel]

#1, I'm pretty sure for cisco equip that hdlc is the default serial.
#2, D? I mean its faster than PPP

 

[pcmark]

Not so sure about this one;

What encapsulation type would you select for a link if speed were the most important?
A. frame relay
B. PPP
C. HDLC --- fairly sure this is it
D. SLIP

Frame Relay would require a circuit specifically designed for it. Frame Relay IS a good choice, however. Now, since they don't specify what type of circuit this is, and the other 3 encapsulation types are pretty "generic' serial encapsulations, HDLC would be the best answer since it has less overhead than PPP. SLIP isn't really even used anymore and it has alot of limitations.

 

[spidey07]

FYI,

you don't need a special circuit to run frame-relay as a layer2 protocol. I use it exclusively on my point-to-point serial lines. less overhead than hdlc, ppp

 

[ScottMac]

I believe HDLC is correct because it would be "normally" (i.e., "The Cisco Way") used on a dedicated Point-to-point connection, whereas Frame Relay would "normally" be used through a carrier cloud, with no (usual) guarantees of performance (SLA for CIRs notwithstanding).

According to Cisco, a P-P link is the fastest, most user-controlled connection (mostly true).

FWIW

Scott