Question

Question 21

1. What property of ARP causes the request to be flooded out all ports of a switch except for the port receiving the ARP request?

   	a.	Entries in an ARP table are time-stamped and are purged after the timeout expires.
   	b.	The destination MAC address FF-FF-FF-FF-FF-FF appears in the header of the Ethernet frame.
   	c.	ARP replies are broadcast on the network when a host receives an ARP request.
   	d.	The type field 0x806 appears in the header of the Ethernet frame.

2 points

Question 22

1. 
   Refer to the topology above. What is the destination MAC address of the Ethernet frame as it leaves the web server if the final destination is PC1?

   	a.	00-60-2F-3A-07-DD
   	b.	00-60-2F-3A-07-BB
   	c.	00-60-2F-3A-07-AA
   	d.	00-60-2F-3A-07-CC

2 points

Question 23

1. 
   Refer to the picture above. There is a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC3. What will the switch do with the frame?

   	a.	The switch will forward the frame only to ports 1 and 3.
   	b.	The switch will forward the frame to all ports.
   	c.	The switch will forward the frame to all ports except port 4.
   	d.	The switch will forward the frame only to port 2.

2 points

Question 24

1. What information does the loopback test provide?

   	a.	The TCP/IP stack on the device is working correctly.
   	b.	The device has the correct IP address on the network.
   	c.	DHCP is working correctly.
   	d.	The device has end-to-end connectivity.

2 points

Question 25

1. What is the auto-MDIX feature on a switch?

   	a.	the automatic configuration of an interface for 10/100/1000 Mb/s operation
   	b.	the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection
   	c.	the automatic configuration of full-duplex operation over a single Ethernet copper or optical cable
   	d.	the ability to turn a switch interface on or off accordingly if an active connection is detected

2 points

Question 26

1. Under which circumstance will a switch flood a frame out of every port except the port that the frame was received on?

   	a.	The source address in the frame header is the broadcast address.
   	b.	The destination address is unknown to the switch.
   	c.	The destination address in the frame is a known unicast address.
   	d.	The source address in the frame is a multicast address.

2 points

Question 27

1. What is a function of NVRAM?

   	a.	to store the routing table
   	b.	to store the ARP table
   	c.	to retain contents when power is removed
   	d.	to contain the running configuration file

2 points

Question 28

1. Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?

   	a.	store-and-forward switching
   	b.	fragment-free switching
   	c.	fast-forward switching
   	d.	cut-through switching

2 points

Question 29

1. A router boots and enters setup mode. What is the reason for this?

   	a.	The POST process has detected hardware failure.
   	b.	The configuration file is missing from NVRAM.
   	c.	The IOS image is corrupt.
   	d.	Cisco IOS is missing from flash memory.

2 points

Question 30

1. 
   Refer to the routing table above. What will be the exit interface when the router forwards a packet with a destination IP of 192.168.4.23?

   	a.	FastEthernet0/0
   	b.	FastEthernet0/1
   	c.	FastEthernet1/0
   	d.	FastEthernet1/1

Answer 1

SOLUTION-(21):- (b) The destination MAC address FF-FF-FF-FF-FF-FF appears in the header of the Ethernet frame.

SOLUTION-(22):- (d) 00-60-2F-3A-07-CC

EXPLANATION:- The destination MAC address is utilized for local delivery of Ethernet frames. The MAC (i.e., Layer 2) address alters at each network segment along the path. When the frame will left the web server, it will be delivered by utilizing the MAC address of the default gateway.

SOLUTION-(23):- (c) The switch will forward the frame to all ports except port 4.

SOLUTION-(24):- (a) The TCP/IP stack on the device is working correctly.

SOLUTION-(25):- (b) The automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection.

SOLUTION-(26):- (b) The destination address is unknown to the switch.

SOLUTION-(27):- (c) To retain contents when power is removed.

EXPLANATION:- NVRAM is non-volatile random access memory, which does not lose its information when the power is removed. This is in contrast to the most common forms of RAM such as DRAM, which needs continual power to maintain its information. NVRAM is utilized by Cisco IOS Software as permanent storage for the startup configuration file (startup-config). All configuration alterations are stored in the running-config file in RAM and, with some exceptions, are implemented immediately via the IOS. If the router is restarted or loses power then in order to save those changes the running-config file must be copied to NVRAM, where it is stored as the startup-config file. NVRAM retains its contents even when the router is switched off.

SOLUTION-(28):- (a) store-and-forward switching

SOLUTION-(29):- (b) The configuration file is missing from NVRAM.

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