N10-005 · Question #410
An administrator configuring remote access opens ports 500/UDP and 10000/UDP on the firewall. Which of the following services are MOST likely being allowed? (Select TWO).
The correct answer is B. IPSec E. L2TP. Port 500/UDP is used by IKE (Internet Key Exchange), the key management protocol for IPSec - making IPSec the correct first answer. L2TP (Layer 2 Tunneling Protocol) is commonly deployed over IPSec and uses UDP-based ports for its tunneling operations. L2TP/IPSec is a widely…
Question
An administrator configuring remote access opens ports 500/UDP and 10000/UDP on the firewall. Which of the following services are MOST likely being allowed? (Select TWO).
Options
- ASSL
- BIPSec
- CKerberos
- DRDP
- EL2TP
- FPPTP
How the community answered
(33 responses)- A6% (2)
- B88% (29)
- D3% (1)
- F3% (1)
Explanation
Port 500/UDP is used by IKE (Internet Key Exchange), the key management protocol for IPSec - making IPSec the correct first answer. L2TP (Layer 2 Tunneling Protocol) is commonly deployed over IPSec and uses UDP-based ports for its tunneling operations. L2TP/IPSec is a widely used VPN combination that requires IKE (500/UDP) for security negotiation. SSL uses TCP 443, Kerberos uses TCP/UDP 88, RDP uses TCP 3389, and PPTP uses TCP 1723 plus GRE - none of which match the ports listed.
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