Update 100-105 Cisco Interconnecting Cisco Networking Devices Part 1

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Share some CCENT 100-105 exam questions and answers below.
Which two statements describe the operation of the CSMA/CD access method? (Choose two.) 
A. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. 
B. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting. 
C. The use of hubs to enlarge the size of collision domains is one way to improve the operation of the CSMA/CD access method. 
D. After a collision, the station that detected the collision has first priority to resend the lost data. 
E. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data. 
F. After a collision, all stations involved run an identical backoff algorithm and then synchronize with each other prior to transmitting data. 
Answer: B,E

Refer to the exhibit. 



The exhibit is showing the topology and the MAC address table. Host A sends a data frame to host D. 
What will the switch do when it receives the frame from host A? 
A. The switch will add the source address and port to the MAC address table and forward the frame to host D. 
B. The switch will discard the frame and send an error message back to host A. 
C. The switch will flood the frame out of all ports except for port Fa0/3. 
D. The switch will add the destination address of the frame to the MAC address table and forward the frame to host D. 
Answer: A 


Which two statements describe the operation of the CSMA/CD access method? (Choose two.) 
A. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. 
B. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting. 
C. The use of hubs to enlarge the size of collision domains is one way to improve the operation of the CSMA/CD access method. 
D. After a collision, the station that detected the collision has first priority to resend the lost data. 
E. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data. 
F. After a collision, all stations involved run an identical backoff algorithm and then synchronize with each other prior to transmitting data. 
Answer: B, E 


Which layer of the OSI model controls the reliability of communications between network devices using flow control, sequencing and acknowledgments? 
A. Physical 
B. Data-link 
C. Transport 
D. Network 
Answer: C

Given a Class C IP address subnetted with a /30 subnet mask, how many valid host IP addresses are available on each of the subnets? 
A. 1 
B. 2 
C. 4 
D. 8 
E. 252 
F. 254 
Answer: B 


What must occur before a workstation can exchange HTTP packets with a web server? 
A. A UDP connection must be established between the workstation and its default gateway. 
B. A UDP connection must be established between the workstation and the web server. 
C. A TCP connection must be established between the workstation and its default gateway. 
D. A TCP connection must be established between the workstation and the web server. 
E. An ICMP connection must be established between the workstation and its default gateway. 
F. An ICMP connection must be established between the workstation and the web server. 
Answer: D 


Refer to the exhibit. 



What kind of cable should be used to make each connection that is identified by the numbers shown? 
A. 1 - Ethernet Crossover cable 
2 - Ethernet straight-through cable 
3 - Fiber Optic cable 
4 - Rollover cable 
B. 1 - Ethernet straight-through cable 
2 - Ethernet straight-through cable 
3 - Serial cable 
4 - Rollover cable 
C. 1 - Ethernet rollover cable 
2 - Ethernet crossover cable 
3 - Serial cable 
4 - Null-modem cable 
D. 1 - Ethernet straight-through cable 
2 - Ethernet Crossover cable 
3 - Serial cable 
4 - Rollover cable 
E. 1 - Ethernet straight-through cable 
2 - Ethernet Crossover cable 
3 - Serial cable 
4 - Ethernet Straight-through cable 
Answer: B 

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