Free Cisco CLCEI 300-820 Actual Exam Questions - Question 1 Discussion

It’s C, because NAT breaks direct IP reachability in SDP connection info.

C imo, NAT messes with IPs shown in SDP, making them unreachable outside the local network. The other options don’t really tie into NAT’s main problem with SIP SDP.

C The biggest issue is that the SDP still shows the private IP, which the other side can’t route to. Options A and B don't really match typical NAT problems with SDP.

C. This one makes sense because NAT changes the internal IP address to a private one that isn’t reachable from outside. So if the SDP carries that internal IP, the other side won’t be able to send media correctly. Options like A or D seem less relevant here since the main NAT issue with SDP is about IP addressing, not encryption keys or packet size. B doesn't fit since NAT doesn’t affect time zone offsets at all.

Maybe C, since NAT usually hides the internal IP addresses.