300-820 · Question #25
Which situation requires TCP port 443 to be open for packets that are sourced from the Internet with a destination in the corporate DMZ?
The correct answer is D. when you require administrative access to the Cisco Expressway Edge from the Internet. TCP port 443 is the standard HTTPS port used for secure web-based administrative access. When an administrator needs to manage the Cisco Expressway Edge appliance from the Internet via its web GUI, the firewall must allow inbound TCP 443 from the Internet to the DMZ where…
Question
Which situation requires TCP port 443 to be open for packets that are sourced from the Internet with a destination in the corporate DMZ?
Options
- Awhen video endpoints that reside on the Internet require administrative access to the Cisco
- Bwhen you require encrypted calls to endpoints on your corporate LAN
- Cwhen you want to enable calls to web applications by using HTTP
- Dwhen you require administrative access to the Cisco Expressway Edge from the Internet
How the community answered
(50 responses)- A6% (3)
- B2% (1)
- C4% (2)
- D88% (44)
Explanation
TCP port 443 is the standard HTTPS port used for secure web-based administrative access. When an administrator needs to manage the Cisco Expressway Edge appliance from the Internet via its web GUI, the firewall must allow inbound TCP 443 from the Internet to the DMZ where Expressway-E resides. Option A is wrong because video endpoints use SIP/H.323 and RTP media ports, not 443. Option B is wrong because encrypted SIP calls use port 5061 (SIP TLS) for signaling and separate UDP/TCP ports for RTP media. Option C is wrong because HTTP uses port 80, not 443.
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