In OSPF, a router in the backbone area (Area 0) has a full LSDB (Link-State Database) for all routers within the OSPF domain. This comprehensive LSDB allows the backbone area to communicate effectively with other areas by providing routing information about all connected OSPF routers, facilitating inter-area routing.
Question 77
The IP address 192.168.1.127/25 represents a ( ) address.
With a subnet mask of /25, the IP range for this subnet would be 192.168.1.0 to 192.168.1.127. Here, 192.168.1.127 is the last usable address in the subnet, making it a valid host address rather than a network or broadcast address. This address falls within the range of available host addresses for that subnet.
Question 78
On a Layer 2 WLAN, STAs use an AC as their gateway.
Detailed Explanation:In a Layer 2 WLAN, an Access Controller (AC) typically handles authentication and management but does not act as a gateway. Instead, a Layer 3 device, such as a router, serves as the gateway. (Reference: HCIA-WLAN Training Material, WLAN Layer 2 and Layer 3 Concepts)
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Question 79
Which of the following statements is true about root bridge election in STP?
Options:
A.
The device with the largest bridge priority becomes the root bridge.
B.
If the bridge priorities of devices are the same, the device with the largest MAC address becomes the root bridge.
C.
The device with the smallest bridge priority becomes the root bridge.
D.
If the bridge priorities are the same, the device with the largest number of ports becomes the root bridge.
In STP, the root bridge is elected based on the lowest bridge priority. If there is a tie in bridge priority, the device with the lowest MAC address is selected as the root bridge. This process ensures a stable, predictable root bridge selection in the network.
