CISCO Certification Questions

Q:

What is the Class B private IP address space?

Answer

172.16.0.0 through 172.31.255.255

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Q:

What is the command to copy a Cisco IOS to a TFTP server?

Answer

copy flash tftp

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Q:

When is redistribution required for EIGRP?

Answer

Redistribution is required when more than one EIGRP session or process is running and they are identified with different ASNs. Redistribution shares topology information between EIGRP sessions.

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Q:

What is the purpose of the AS_PATH attribute?

Answer

If a router has more than one route to the same IP prefix, the best path is the one with the shortest AS_PATH (assuming other BGP attributes are equal).

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Q:

Differentiate types of Ethernet cabling and identify their proper application?

Answer

The three types of cables that can be created from an Ethernet cable are straight-through (to connect a PC's or a router's Ethernet interface to a hub or switch), crossover (to connect hub to hub , hub to switch, switch to switch, or PC to PC), and rolled (for a console conection from a PC to a router or switch).

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Q:

Describe the functions of DNS and DHCP in the network?

Answer

Dynamic Host Configuration protocol (DHCP) provides network configuration information (including IP address) to hosts, eliminating the need to perform the configurations manually.


Domain Name Service  (DNS)resolves hostnames - both internet names such as www.routersim.com and device names such as workstation 2 to IP addresses, eliminating the need to know the IP address of a device for connection purposes.

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Q:

What type of Cisco tagging information allows VLANs to be multiplexed over a trunk link through an external encapsulation method?

Answer

Inter-Switch Link (ISL)

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Q:

Which proprietary Cisco STP extensions would put a switch port into err-disabled if a BPDU is received on this port?

Answer

BPDUGuard

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