MENU
Typically, a protocol that occupies two ports during communication is called a multi-channel protocol. For such protocols, the ASPF function must be enabled on the firewall to ensure smooth setup of the data channel and reduce the risk of attacks. Which of the following protocols is not a multi-channel protocol?
Suggested Answer: C
Get Premium H12-821_V1.0 Questions
as Interactive Web-Based Practice Test or PDF
Real Exam Format
Detailed Explanations
Instant Access
Get Your Practice Test
Comprehensive and Detailed Step-by-Step
Multi-Channel Protocols:
Multi-channel protocols use separate channels for control and data communication, requiring application-specific packet filtering (ASPF) to track sessions.
Examples:
FTP (A): Uses separate control and data channels.
SIP (B): Uses multiple ports for signaling and media.
HCIA-Datacom Study Guide, Chapter: Firewall ASPF Configuration
Huawei Multi-Channel Protocol Handling
21 comments · newest first
KA
Karima
2 days ago
Yes, they do. H.323 is also multi-channel.
WI
Willard
7 days ago
FTP and SIP use multiple channels, right?
LA
Latanya
12 days ago
Agreed, SMTP doesn't need two ports.
SK
Skye
17 days ago
I think SMTP is the answer. It's single-channel.
NA
Nan
22 days ago
I’m nervous, but I think we’ve got this!
JO
Joanna
28 days ago
Good luck everyone! Hope we all get this right!
TU
Tuyet
1 month ago
I remember learning that SMTP is for emails, not multi-channel.
SC
Scarlet
1 month ago
H.323 is definitely multi-channel too.
RO
Roxane
1 month ago
Right! FTP and SIP use multiple channels, so they're out.
GI
Giuseppe
2 months ago
I feel confident about this. Multi-channel protocols are complex.
EL
Elza
2 months ago
Agreed! SMTP only uses one channel.
LU
Luisa
2 months ago
This question is tricky! I think SMTP is the answer.
MI
Minna
2 months ago
H.323 is tricky, but it uses multiple channels.
BR
Brett
2 months ago
FTP and SIP are multi-channel for sure!
JE
Jeannine
2 months ago
Wait, are we sure about that?
TE
Tegan
3 months ago
Agreed, SMTP doesn't need ASPF.
DI
Dino
3 months ago
SMTP is definitely a single-channel protocol.
RO
Rodolfo
3 months ago
I practiced a question like this before, and I think SMTP is the correct answer since it handles emails on a single channel.
JO
Joanne
3 months ago
H.323 definitely uses multiple channels, but I'm a bit confused about the specifics of SIP and how it compares to SMTP.
GW
Gwen
3 months ago
I think SMTP is the one that doesn't need ASPF since it's a single-channel protocol, right?
AN
Anna
4 months ago
I remember studying that FTP and SIP both use multiple channels, but I'm not entirely sure about SMTP.