You are troubleshooting an IPsec VPN tunnel where ESP packets are being dropped by an intermediary firewall. Which OSI layer protocols are being blocked?
Answers
ASession
BData Link
CNetwork
DTransport
Correct answer: C — Network
Objective 1.1: IPsec (including ESP) operates at the Network layer (Layer 3). Transport is Layer 4, Session Layer 5, Data link Layer 2.
MIFOTRA exam practicealigned to Cisco CCNA 200-301·3 marks·Medium