exam questions

Exam 300-820 All Questions

View all questions & answers for the 300-820 exam

Exam 300-820 topic 1 question 3 discussion

Actual exam question from Cisco's 300-820
Question #: 3
Topic #: 1
[All 300-820 Questions]

When an Expressway-E is configured for static NAT, which Session Description Protocol attribute is modified to reflect the NAT address?

  • A. SDP b-line
  • B. SIP record route
  • C. SDP c-line
  • D. SDP m-line
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️

Comments

Chosen Answer:
This is a voting comment (?). It is better to Upvote an existing comment if you don't have anything to add.
Switch to a voting comment New
AKREM86
Highly Voted 2 years, 9 months ago
C is correct as c-line shows the connection information, Media IP address. So if it is natted it will be reflected there.
upvoted 8 times
...
Collabinski
Most Recent 9 months, 2 weeks ago
Selected Answer: C
With static NAT enabled on LAN2 of the Expressway-E, the c-line of the SIP INVITE has now been rewritten to c=IN IP4 64.100.0.10, and this means that when endpoint B sends outbound RTP media to endpoint A, this will be sent to IP address 64.100.0.10, the public NAT address of the NAT router, which is 1:1 NATed to the LAN2 IP address of the Expressway-E, 10.0.10.2. As RTP media from endpoint B arrives at the NAT router with a destination IP address of 64.100.0.10, the NAT router will forward these packets to the Expressway-E at 10.0.10.2 and two-way media is achieved. https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-5/Cisco-Expressway-Basic-Configuration-Deployment-Guide-X8-5-2.pdf
upvoted 3 times
...
Simdude
2 years, 10 months ago
it should be D
upvoted 1 times
iamnoone
1 month, 2 weeks ago
No it shouldn't. B is correct.
upvoted 1 times
...
...
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.

Upvoting a comment with a selected answer will also increase the vote count towards that answer by one. So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.

SaveCancel
Loading ...
exam
Someone Bought Contributor Access for:
SY0-701
London, 1 minute ago