What is an advantage of configuring a Cisco router as a relay agent?

Last Updated: Jan 16, 2023
IT Exam Items Repository › Category: CCNA 2 v6 › What is an advantage of configuring a Cisco router as a relay agent?

What is an advantage of configuring a Cisco router as a relay agent?

  • It can provide relay services for multiple UDP services.
  • It reduces the response time from a DHCP server.
  • It can forward both broadcast and multicast messages on behalf of clients.
  • It will allow DHCPDISCOVER messages to pass without alteration.

Explanation: By default, the ip helper-address command forwards the following eight UDP services:
Port 37: Time
Port 49: TACACS
Port 53: DNS
Port 67: DHCP/BOOTP client
Port 68: DHCP/BOOTP server
Port 69: TFTP
Port 137: NetBIOS name service
Port 138: NetBIOS datagram service

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