What must be seen in the ARP table on Host1 to establish Internet connectivity in an HSRP configuration?

What must be seen in the ARP table on Host1 to establish Internet connectivity in an HSRP configuration?

• A. The virtual IP address and the active MAC address for the HSRP
• B. The physical MAC address of R1
• C. The IP address of the DHCP server
• D. The secondary IP address of R2

Answer: (A)

To establish Internet connectivity in a Hot Standby Router Protocol (HSRP) configuration, Host1 should see the virtual IP address and the active MAC address for the HSRP in its Address Resolution Protocol (ARP) table. In an HSRP setup, a virtual IP address is assigned to a logical group of routers (the HSRP group). This virtual IP address serves as the default gateway for hosts on the local network. When Host1 tries to communicate with an external network (such as the Internet), it sends packets to the virtual IP address. To successfully send these packets, Host1 needs to resolve the virtual IP to a MAC address. HSRP designates one router in the group as the active router and another as the standby router. The active router responds to ARP requests with its MAC address when the virtual IP address is queried. Hence, Host1 must have the current mapping of the virtual IP address to the active router's MAC address in its ARP table to ensure it can reach the intended gateway without issues. This understanding is critical because if Host1 does not find the correct mapping, it will be unable to send packets to the virtual IP address correctly, leading to failed connectivity to the Internet.

To establish Internet connectivity in a Hot Standby Router Protocol (HSRP) configuration, Host1 should see the virtual IP address and the active MAC address for the HSRP in its Address Resolution Protocol (ARP) table.

In an HSRP setup, a virtual IP address is assigned to a logical group of routers (the HSRP group). This virtual IP address serves as the default gateway for hosts on the local network. When Host1 tries to communicate with an external network (such as the Internet), it sends packets to the virtual IP address. To successfully send these packets, Host1 needs to resolve the virtual IP to a MAC address.

HSRP designates one router in the group as the active router and another as the standby router. The active router responds to ARP requests with its MAC address when the virtual IP address is queried. Hence, Host1 must have the current mapping of the virtual IP address to the active router's MAC address in its ARP table to ensure it can reach the intended gateway without issues.

This understanding is critical because if Host1 does not find the correct mapping, it will be unable to send packets to the virtual IP address correctly, leading to failed connectivity to the Internet.