ICND Interconnecting Cisco Networking
Devices Part 1
Cisco 100-105
Total Questions: 10
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QUESTION NO: 1
Which of the following are found in a TCP header, but not in a UDP header? (Choose three.)
A. sequence number
B. acknowledgment number
C. source port
D. destination port
E. window size
F. checksum
Correct Answer: ABE
Section: (none)
Explanation:
QUESTION NO: 2
What does a host on an Ethernet network do when it is creating a frame and it does not have the
destination address?
A. drops the frame
B. sends out a Layer 3 broadcast message
C. sends a message to the router requesting the address
D. sends out an ARP request with the destination IP address
Correct Answer: D
Section: (none)
Explanation:
Understanding this concept is prime for understanding that when switch receives the data frame from
the host not having the MAC address already in the MAC table, it will add the MAC address to the
source port on the MAC address table and sends the data frame. If the switch already has the MAC
address in its table for the destination, it will forward the frame directly to the destination port. If it was
not already in its MAC table, then they frame would have been flooded out all ports except for the port
that it came from.
QUESTION NO: 3
What is the binary of the IPv6 multicast address?
Correct Answer: 11111111
Section: (none)
Explanation:
IPv6 multicast addresses are distinguished from unicast addresses by the value of the high-order octet
of the addresses: a value of 0xFF (binary 11111111) identifies an address as a multicast address; any
other value identifies an address as a unicast address
QUESTION NO: 4
A receiving host has failed to receive all of the segments that it should acknowledge. What can the host
do to improve the reliability of this communication session?
A. decrease the window size
B. use a different source port for the session
C. decrease the sequence number
D. obtain a new IP address from the DHCP server
E. start a new session using UDP
Correct Answer: A
Section: (none)
Explanation:
QUESTION NO: 5
If you want multiple hosts on a network, where do you configure the setting?
A. in the IP protocol
B. in the multicast interface
C. in the serial interface
D. in the global configuration
Correct Answer: A
Section: (none)
Explanation:
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QUESTION NO: 6
Refer to the exhibit. Why did the device return this message?
A. The command requires additional options or parameters
B. There is no show command that starts with ru.
C. The command is being executed from the wrong router mode.
D. There is more than one show command that starts with the letters ru.
Correct Answer: D
Section: (none)
Explanation:
Answer D is correct because when you type the incomplete command having more same more
command same up to types characters it shows display the ambiguous command error.
QUESTION NO: 7
What command sequence will configure a router to run OSPF and add network 10.1.1.0 /24 to area 0?
.
router ospf area 0
network 10.1.1.0 255.255.255.0 area 0
B. router ospf network 10.1.1.0 0.0.0.255
C. router ospf 1 network 10.1.1.0 0.0.0.255 area 0
D. router ospf area 0 network 10.1.1.0 0.0.0.255 area 0
E. router ospf network 10.1.1.0 255.255.255.0 area 0
F. router ospf 1 network 10.1.1.0 0.0.0.255
Correct Answer: C
Section: (none)
Explanation:
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QUESTION NO: 8
Which technology allows a large number of private IP addresses to be represented by a smaller number
of public IP addresses?
A. NAT
B. NTP
C. RFC 1631
D. RFC 1918
Correct Answer: A
Section: (none)
Explanation:
QUESTION NO: 9
Which two statements about access ports are true? (Choose two.)
A. They can act as a host and a trunk port simultaneously.
B. They forward all 802.1Q packets to trunk ports.
C. An individual access port can transmit traffic for only one data VLAN.
D. Each individual access port can support multiple data VLANs.
E. They are assigned to VLAN 1 by default.
Correct Answer: CE
Section: (none)
Explanation:
QUESTION NO: 10
Refer to the exhibit.
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If CDP is enabled on all devices and interfaces, which devices will appear in the output of a show cdp
neighbors command issued from R2?
A. R1, S1, S2, R3 and S3
B. R2 and R3
C. R3 and S2
D. R1 and R3
E. R1, S1, S2, and R3
Correct Answer: C
Section: (none)
Explanation:
A Cisco device enabled with CDP sends out periodic interface updates to a multicast address in order
to make itself known to neighbors. Since it is a layer two protocol, these packets are not routed. So the
devices detected would be immediate connected neighbors.
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