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Q:

With which network type will OSPF establish router adjacencies but not perform the DR/BDR election process?

A) Point-to-Point B) Backbone area 0
C) Broadcast multi-access D) Non-broadcast multi-access
 
Answer & Explanation Answer: A) Point-to-Point

Explanation:

No DR is assigned on any type of point-to-point link. No DR/BDR is assigned on the NBMA point-to-multipoint due to the hub/spoke  topology. DR and BDR are elected on broadcast and non-broadcast multi-access network. Frame relay is a non-broadcast multiaccess (NBMA) network by default.

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Filed Under: CCNA

Q:

When a PC sends a packet to another PC in a remote network, what destination IP address and MAC address will be in the frame that it sends to its default gateway?

Answer

It will use the gateway interface MAC at L2 and the actual destination IP at L3. 

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Subject: CCNA

Q:

A network administrator views the output from the show ip route command. A network that is advertised by both RIP and EIGRP appears in the routing table flagged as an EIGRP route. why is the RIP route to this network not used in the routing table?

A) EIGRP has a faster update timer B) EIGRP has a lower administrative distance
C) RIP has a higher metric for that route D) The RIP path has a routing loop
 
Answer & Explanation Answer: B) EIGRP has a lower administrative distance

Explanation:

RIP has an administrative distance (AD) of 120, while EIGRP has an administrative distance of 90, so the router will discard any route with a higher AD than 90 to that same network.

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Q:

You telnet into a remote device and type debug ip rip, but no output from the debug command is seen. What could the problem be?

A) You must type the show ip rip command first B) IP addressing on the network is incorrect
C) You must use the terminal monitor command D) Debug output is sent only to the console.
 
Answer & Explanation Answer: C) You must use the terminal monitor command

Explanation:

To see console messages through your Telnet session, you must enter the terminal monitor command.

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Q:

You copy a configuration from a network host to a router's RAM. The configuration looks correct, yet it is not working at all. What could the problem be?

A) You copied the wrong configuraion into RAM B) You copied the configuration into flash memory instead
C) The copy did not override the shutdown command in running-config D) The IOS became corrupted after the copy command was initiated
 
Answer & Explanation Answer: C) The copy did not override the shutdown command in running-config

Explanation:

Since the configuration looks correct, you probably didn't screw up the copy job. However , when you perform a copy from a network host to a router , the interfaces are automatically shut dow and need to be manually enabled with the no shutdown command.

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Q:

What network service is the most likely problem if you can ping a computer by IP address but not by name?

A) DNS B) DHCP
C) ARP D) ICMP
 
Answer & Explanation Answer: A) DNS

Explanation:

 The most likely problem if you can ping a computer by IP address but not by name is a failure of DNS.

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Q:

How does DHCP client ensure that no other computer has its assigned IP address?

A) Acknowledge receipt of a TCP segment B) Ping to its own address to see if a response is detected
C) Broadcast a Proxy ARP D) Broadcast a gratuitous ARP
 
Answer & Explanation Answer: D) Broadcast a gratuitous ARP

Explanation:

To stop possible address conflicts , a DHCP client will use gratuitous ARP (broadcast an ARP request for its own IP address) to see if another host responds.

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Q:

You want to implement a network medium that is not susceptible to EMI. Which type of cabling should you use?

A) Thicknet coax B) Thinnet coax
C) Category 5 UTP cable D) Fiber-optic cable
 
Answer & Explanation Answer: D) Fiber-optic cable

Explanation:

Fiber-optic cable provides a more secure, long - distance cable that is not susceptible to EMI interference at high speeds.

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Filed Under: CCNA