Computer Networking
Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?

Router (config) #ip unnumbered
Router (config) #ip subnet-zero
Router (config) #ip classless
Router (config) #no ip classful

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Computer Networking
To configure the VLAN trunking protocol to communicate VLAN information between two switches, what two requirements must be met?1. Each end of the trunk link must be set to the IEEE 802.1e encapsulation.2. The VTP management domain name of both switches must be set the same.3. All ports on both the switches must be set as access ports.4. One of the two switches must be configured as a VTP server.5. A rollover cable is required to connect the two switches together.6. A router must be used to forward VTP traffic between VLANs.

1, 2 and 4
3, 5 and 6
2 and 4
1 and 6

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Computer Networking
You save the configuration on a router with the copy running-config startup-config command and reboot the router. The router, however, comes up with a blank configuration. What can the problem be?

NVRAM is corrupted.
The configuration register setting is incorrect.
You didn
The newly upgraded IOS is not compatible with the hardware of the router.

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