Given the networks 10.0.0.0/16, 10.1.0.0/16, and 10.2.0.0/16, which command correctly advertises only the 10.1.0.0 network in OSPF?

Given the networks 10.0.0.0/16, 10.1.0.0/16, and 10.2.0.0/16, which command correctly advertises only the 10.1.0.0 network in OSPF?

• A. router(config-router)# network 10.0.0.0 0.0.255.255 area 0
• B. router(config-router)# network 10.1.0.0 0.0.255.255 area 0
• C. router(config-router)# network 10.1.0.0 0.0.1.255 area 0
• D. router(config-router)# network 10.2.0.0 0.0.255.255 area 0

Answer: (B)

The command that correctly advertises only the 10.1.0.0 network in OSPF uses the network statement with a specific wildcard mask that matches this particular network. In this case, the command `router(config-router)# network 10.1.0.0 0.0.255.255 area 0` accurately identifies the 10.1.0.0/16 network by using the wildcard mask of 0.0.255.255. In OSPF, the network command is used to specify which interfaces on a router will participate in OSPF and which networks to advertise. The network address specified is the base address of the subnet, while the accompanying wildcard mask defines which bits of the address should be considered significant. With a wildcard mask of 0.0.255.255, only the first two octets (10.1.x.x) are specified, effectively advertising the entire 10.1.0.0/16 subnet. The command correctly matches the intended subnet for OSPF advertisement and places the corresponding interfaces into area 0 for routing updates, ensuring that only the specified network is included. By contrast, other commands do not specifically restrict the advertisement to only the 10

The command that correctly advertises only the 10.1.0.0 network in OSPF uses the network statement with a specific wildcard mask that matches this particular network. In this case, the command router(config-router)# network 10.1.0.0 0.0.255.255 area 0 accurately identifies the 10.1.0.0/16 network by using the wildcard mask of 0.0.255.255.

In OSPF, the network command is used to specify which interfaces on a router will participate in OSPF and which networks to advertise. The network address specified is the base address of the subnet, while the accompanying wildcard mask defines which bits of the address should be considered significant. With a wildcard mask of 0.0.255.255, only the first two octets (10.1.x.x) are specified, effectively advertising the entire 10.1.0.0/16 subnet.

The command correctly matches the intended subnet for OSPF advertisement and places the corresponding interfaces into area 0 for routing updates, ensuring that only the specified network is included.

By contrast, other commands do not specifically restrict the advertisement to only the 10