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100-105 Product Description:
Exam Number/Code: 100-105 vce
Exam name: Cisco Interconnecting Cisco Networking Devices Part 1 (ICND1 v3.0)
n questions with full explanations
Certification: Cisco Certification
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Instant Access to Free VCE Files: Cisco 100-105 Cisco Interconnecting Cisco Networking Devices Part 1 (ICND1 v3.0)

100-105 examcollection

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Q31. - (Topic 5) 

Refer to the exhibit. 

The network administrator made the entries that are shown and then saved the configuration. From a console connection, what password or password sequence is required for the administrator to access privileged mode on Router1? 

A. cisco 

B. sanfran 

C. sanjose 

D. either cisco or sanfran 

E. either cisco or sanjose 

F. sanjose and sanfran 

Answer:

Explanation: 

The enable secret password takes precedence over the enable password, so sanfran will be used. 


Q32. - (Topic 7) 

Which MTU size can cause a baby giant error? 

A. 1500 

B. 9216 

C. 1600 

D. 1518 

Answer:

Explanation: http://www.cisco.com/c/en/us/support/docs/switches/catalyst-4000-series-switches/29805-175.html 


Q33. - (Topic 3) 

Which parameter or parameters are used to calculate OSPF cost in Cisco routers? 

A. Bandwidth 

B. Bandwidth and Delay 

C. Bandwidth, Delay, and MTU 

D. Bandwidth, MTU, Reliability, Delay, and Load 

Answer:

Explanation: 

The well-known formula to calculate OSPF cost is Cost = 108/ Bandwidth 


Q34. - (Topic 1) 

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:

Explanation: 

HTTP uses TCP port 80, and a TCP port 80 connection must be established for HTTP communication to occur. http://pentestlab.wordpress.com/2012/03/05/common-tcpip-ports/ 


Q35. - (Topic 3) 

On a live network, which commands will verify the operational status of router interfaces? (Choose two.) 

A. Router# show interfaces 

B. Router# show ip protocols 

C. Router# debug interface 

D. Router# show ip interface brief 

E. Router# show start 

Answer: A,D 

Explanation: 

Only two commands “show interfaces” and “show ip interface brief” reveal the status of router interfaces (up/up, for example). 


Q36. - (Topic 3) 

A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common Ethernet link. 

The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2. Based on the information in the graphic, what is the cause of this problem? 

A. The OSPF area is not configured properly. 

B. The priority on R1 should be set higher. 

C. The cost on R1 should be set higher. 

D. The hello and dead timers are not configured properly. 

E. A backup designated router needs to be added to the network. 

F. The OSPF process ID numbers must match. 

Answer:

Explanation: 

In OSPF, the hello and dead intervals must match and here we can see the hello interval is set to 5 on R1 and 10 on R2. The dead interval is also set to 20 on R1 but it is 40 on R2. 


Q37. - (Topic 2) 

Refer to the exhibit. 

The MAC address table is shown in its entirety. The Ethernet frame that is shown arrives at 

the switch. 

What two operations will the switch perform when it receives this frame? (Choose two.) 

A. The switch will not forward a frame with this destination MAC address. 

B. The MAC address of 0000.00aa.aaaa will be added to the MAC Address Table. 

C. The MAC address of ffff.ffff.ffff will be added to the MAC address table. 

D. The frame will be forwarded out of all the active switch ports except for port fa0/0. 

E. The frame will be forwarded out of fa0/0 and fa0/1 only. 

F. The frame will be forwarded out of all the ports on the switch. 

Answer: B,D 

Explanation: 

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. 


Q38. - (Topic 5) 

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 

Answer: A Explanation: 

The Window bit in the header determines the number of segments that can be sent at a time. This is done to avoid overwhelming the destination. At the start of the session the window in small but it increases over time. The destination host can also decrease the window to slow down the flow. Hence the window is called the sliding window. When the source has sent the number of segments allowed by the window, it cannot send any further segments till an acknowledgement is received from the destination. On networks with high error rates or issues, decreasing the window size can result in more reliable transmission, as the receiver will need to acknowledge fewer segments. With a large window size, the sender will need to resend all the frames if a single one is not received by the receiver. 


Q39. - (Topic 2) 

What is the purpose of flow control? 

A. To ensure data is retransmitted if an acknowledgement is not received. 

B. To reassemble segments in the correct order at the destination device. 

C. To provide a means for the receiver to govern the amount of data sent by the sender. 

D. To regulate the size of each segment. 

Answer:

Explanation: 

Flow control is the management of data flow between computers or devices or between nodes in a network so that the data can be handled at an efficient pace. Too much data arriving before a device can handle it causes data overflow, meaning the data is either lost or must be retransmitted. For serial data transmission locally or in a network, the Xon/Xoff protocol can be used. For modem connections, either Xon/Xoff or CTS/RTS (Clear to Send/Ready to Send) commands can be used to control data flow. In a network, flow control can also be applied by refusing additional device connections until the flow of traffic has subsided. 

Reference: http://whatis.techtarget.com/definition/flow-control 


Q40. - (Topic 1) 

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:

Explanation: 

When connecting a PC to a switch, a standard Ethernet straight through cable should be used. This same cable should also be used for switch to router connections. Generally 

speaking, crossover cables are only needed when connecting two like devices (PC-PC, 

switch-switch, router-router, etc). 

Routers connect to frame relay and other WAN networks using serial cables. 

Rollover cables are special cables used for connecting to the console ports of Cisco 

devices. 



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