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GIAC GSNA Exam - Topic 1 Question 75 Discussion

Posted by Florencia on Aug 13, 2025 at 07:42 PM

A Cisco router can have multiple connections to networks. These connections are known as interfaces for Cisco Routers. For naming each interface, Cisco generally uses the type of interface as part of the name. Which of the following are true about the naming conventions of Cisco Router interfaces?

Each correct answer represents a complete solution. Choose all that apply.

Suggested Answer: A, B, C

A Cisco router can have multiple connections to networks. These connections are known as interfaces for Cisco Routers. For naming each interface, Cisco generally uses the type of interface as part of the name.

Following are some of the naming conventions of Cisco Router interfaces:

An Ethernet interface that is fast always starts with an F.

An interface connected to a serial connection always starts with an S.

An interface connected to an Ethernet segment of the network always starts with an E.

An interface connected to a Token Ring segment always starts with To.


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24 comments · newest first
SU
Suzi 9 months ago
So, does that mean all Ethernet interfaces start with En? That's surprising!
PH
Phyliss 9 months ago
C sounds right, but I'm not sure about F.
LI
Lindsey 10 months ago
Wait, isn't B outdated?
AR
Arlene 10 months ago
I think D is correct too.
ER
Ernest 11 months ago
A is definitely true!
MI
Ming 11 months ago
I think Ethernet interfaces do start with En, so option D should be correct too. Just need to double-check my notes on that!
LI
Lindsey 11 months ago
For Ethernet, I recall that fast Ethernet interfaces start with F, so option C sounds right, but I'm a bit confused about the others.
RE
Rebeca 11 months ago
I'm not entirely sure about Token Ring, but I think it does start with To. I might have seen that in a practice question.
ER
Erasmo 11 months ago
I remember studying that serial interfaces start with S, so I think option A is definitely correct.
JA
Janine 12 months ago
The interface naming conventions are tricky to remember, but I'll try to apply the patterns I know and make an educated guess on the ones I'm not sure about.
WI
Willow 12 months ago
Okay, let me think this through. Serial interfaces start with S, token ring with To, and fast Ethernet with F. I think I've got a good handle on this.
SO
Son 1 year ago
Hmm, I'm a bit unsure about the Ethernet interface naming. Does it really start with "En"? I'll have to double-check that.
JA
Jaime 1 year ago
I'm pretty confident about this one. The key is to look for the interface type in the name, like serial, token ring, or Ethernet.
LI
Linwood 1 year ago
I agree with Francoise, but I'm not sure about the Token Ring one. Doesn't Cisco mostly use Ethernet these days?
HU
Hui 9 months ago
↳ replying to Linwood
I believe it starts with To, but it's not commonly used anymore.
IS
Isabelle 10 months ago
↳ replying to Linwood
Yeah, I agree. Fast Ethernet starts with F for sure.
CO
Colby 10 months ago
↳ replying to Linwood
I think the Ethernet ones are definitely true.
SO
Sommer 10 months ago
↳ replying to Linwood
But what about the Token Ring? Is it still relevant?
FR
Francoise 1 year ago
Okay, let's see. I think A, C, and D are correct. The type of interface is definitely part of the naming convention.
RU
Rutha 1 year ago
↳ replying to Francoise
Yes, you're right. Those are the correct naming conventions for Cisco Router interfaces.
ER
Ernie 1 year ago
↳ replying to Francoise
So, interfaces connected to serial connections start with an S, fast Ethernet interfaces start with an F, and Ethernet interfaces start with En.
TR
Tran 1 year ago
↳ replying to Francoise
I agree, A, C, and D are correct. The naming convention includes the type of interface.
CH
Chuck 1 year ago
↳ replying to Francoise
I agree, A, C, and D are correct. The naming convention is based on the type of interface.
GL
Glenn 1 year ago
I think A is true because serial connections start with S.
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