In a VRRP-A topology that contains four devices, select the number of devices on which a single VRID can be simultaneously active?
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A. B. C. D.A
In a Virtual Router Redundancy Protocol - A (VRRP-A) topology, the devices are configured in a group and share a common virtual IP address. One of the devices is elected as the master, and it is responsible for forwarding packets sent to the virtual IP address. The other devices act as backups and take over the forwarding role if the master fails.
In VRRP-A, each group is identified by a Virtual Router ID (VRID), which is a number between 1 and 255. The VRID is used to differentiate between different VRRP-A groups that are active on the same physical network.
The question asks about the number of devices on which a single VRID can be simultaneously active. The answer is B, 2.
In VRRP-A, only one device can be the master for a given VRID at any given time. However, multiple devices can be configured as backups for the same VRID. The backups monitor the master device and take over if it fails.
Therefore, in a VRRP-A topology with four devices, a single VRID can be active on two devices: one master and one backup. The remaining two devices can be configured with a different VRID or left as standby devices without a VRRP-A configuration.
To summarize, the correct answer is B, 2. Only one device can be the master for a given VRID, but multiple devices can be configured as backups. In a VRRP-A topology with four devices, a single VRID can be active on two devices: one master and one backup.