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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Some of the older Certkiller switches store the entire frame before forwarding it to the destination. What are two effects on network performance of configuring a switch to do this?
Increased latency and Filtering of all frame errors
It will prevent segment 1's broadcasts from getting to segment 2.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Encapsulations PPP and authentication CHAP

2. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Transport
Data link
A cross-over cable

3. You unsuccessfully try to ping the Internet from the PC host on the LAN. During the troubleshooting process - you enter the 'show ip nat translations' command but the output is blank. What is the most likely cause of the problem?
All switch and bridge ports are in either the forwarding or blocking state.
An electrical pulse indicates that the collision has cleared.
The interfaces must be configured for NAT.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

4. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
VTP
In an improperly implemented redundant topology
Decrease the window size.
Serial0/1 is down - line protocol is down

5. Both the switches and hubs are being utilized within the CK network. Which of the following is true regarding the use of switches and hubs for the network connectivity in this network?
Transport
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Switches increase the number of collision domains in the network.
Encapsulations PPP and authentication CHAP

6. While troubleshooting a connectivity problem on the network - you issure the ping command from your PC command prompt - but the output shows 'request times out' At which OSI layer is this problem associated with?
It is used to prevent switching loops in networks with redundant switched routes.
It will prevent segment 1's broadcasts from getting to segment 2.
The network layer
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.

7. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
The network layer
Learning - Listening - and Forwarding
Layer 4
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

8. Although TCP segments are similar to UDP segments - TCP packets contains some additional fields. Which of the following are found in a TCP header - but not in a UDP header?
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
Sequence number - Window size - and Acknowledgment number
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

9. Which protocol uses TCP port 443 at layer 4?
STP
HTTPS
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

10. As a network Admin - you will need to decide on the appropriate network devices to use. Which of the following correctly describes the roles of the devices in a WAN?
TCP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

11. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
MAC Address and Bridge Priority
Port security
Duplex mismatch

12. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Physical Layer and Datalink Layer
An electrical pulse indicates that the collision has cleared.
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.

13. Which OSI layer header contains the address of a destination host that is on another network?
The sequence number in the TCP header.
An additional broadcast domain will be created.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Network

14. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
ARP and ICMP
Switches increase the number of collision domains in the network.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

15. Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Certkiller B > trace
The switch will forward the frame to a specific port
Hosts use a logical bus topology

16. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Telnet and FTP
802.1Q and ISL
100 meters
TCP

17. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Congestion avoidance - Windowing and Buffering
Auto - Desirable - and On
Network
Switches increase the number of collision domains in the network.

18. The corporate head office of Certkiller has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses UDP as the transport for the data transmissions. If these UDP datagrams arrive at their destination out of sequence - wh
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
It is used to prevent switching loops in networks with redundant switched routes.
Switches increase the number of collision domains in the network.
Buffering - Cut-through - and Congestion avoidance

19. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
802.1Q and ISL
Source Port - Acknowledgment Number - and Window
Switches increase the number of collision domains in the network.
Encapsulations PPP and authentication CHAP

20. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Duplex mismatch
Fiber optic cable.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Transport

21. The LAN needs are expanding at the CK corporate office - which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the CK network. Which of the following are layer 1 devices that you can use?
The interfaces must be configured for NAT.
A hub and A repeater.
Fiber optic cable.
TCP

22. You are the administrator of the Certkiller LAN and you have been reviewing error logs of networking devices and notice a large number of errors associated with several MAC addresses. You suspect that some of the errors are being generated by the rou
Show arp and Show interface
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Layer 3

23. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Hosts use a logical bus topology
Encapsulations PPP and authentication CHAP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

24. As the Certkiller network administrator - you are required to have a firmunderstanding of the OSI model. Why does the data communication industry use the layered OSI reference model?
Path selections and Packet switching.
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
Certkiller B > trace
An additional broadcast domain will be created.

25. Which of the following are types of flow control?
Switches increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Learning - Listening - and Forwarding
Buffering - Cut-through - and Congestion avoidance

26. You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network?
100 meters
Congestion avoidance - Windowing and Buffering
Path selections and Packet switching.
Auto - Desirable - and On

27. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location?
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
The Bridgeg ID and The bridge priority
Learning - Listening - and Forwarding
ARP and ICMP

28. As a Certkiller trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
CertK Switch(config)# ip default-gateway 192.168.1.115
Application
This is an Ethernet port operating at half duplex
HTTPS - SMTP - and TFTP

29. You are logged into a router and wish to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?
Show cdp neighbor detail
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
A cross-over cable
Path selections and Packet switching.

30. Which of the following can lead to the contribution of LAN traffic congestion?
A hub and A repeater.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The network layer
An additional broadcast domain will be created.

31. You need to perform some initial configuration tasks on a new Certkiller switch. What is the purpose of assigning an IP address to a switch?
To allow remote management of the switch.
HTTPS - SMTP - and TFTP
Auto - On - and Desirable
The port is experiencing errors

32. As a CCNA candidate - you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model?
HTTPS - SMTP - and TFTP
Telnet and FTP
VLAN and Swtich
Hosts use a logical bus topology

33. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
It is used to prevent switching loops in networks with redundant switched routes.
Show cdp neighbor detail
The network layer
Path selections and Packet switching.

34. While troubleshooting an issue in the Certkiller LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement - What is known about the network interface port?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
This is an Ethernet port operating at half duplex
Decrease the window size.
To prevent switching loops in networks with redundant switched paths.

35. Which of the following services use TCP?
SMTP FTP and HTTP
Duplex mismatch
802.3ab and 802.3z
Data link

36. The Certkiller corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

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37. You need to configure two Certkiller switches to exchange VLAN information. Which protocol provides a method of sharing VLAN configuration information between these two switches?
Fiber optic cable.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Layer 4
VTP

38. 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?
Application
It is the sum of the costs based on bandwidth
All switch and bridge ports are in either the forwarding or blocking state.
Decrease the window size.

39. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Congestion avoidance - Windowing and Buffering
An additional broadcast domain will be created.
VTP will allow switches to share VLAN configuration information
Transport

40. In a switched LAN network - What is the Spanning-Tree algorithm used for?
The network layer
It is used to prevent switching loops in networks with redundant switched routes.
Decrease the window size.
Layer 4

41. Why is full-duplex Ethernet superior to its single-duplex counterpart?
The system is malfunctioning.
Increased latency and Filtering of all frame errors
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
It operates without collisions and It provides faster data transfer

42. While troubleshooting a connectivity problem - the Certkiller network administrator notices that a port status LED on a Cisco Catalyst Series switch is alternating between green and amber. Which condition could this indicate?
The port is experiencing errors
An additional broadcast domain will be created.
Transport
Auto - On - and Desirable

43. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
Duplex mismatch
Layer 3
Information about a route should never be sent back in the direction from which the original update came.

44. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
802.1Q and ISL
Layer 4
A cross-over cable

45. Which of the following correctly describe steps in the OSI date encapsulation process?
Information about a route should never be sent back in the direction from which the original update came.
Port security
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
VLAN and Swtich

46. You have set up an Internet based FTP server - where people can upload and download files. In terms of the OSI model - What is the highest layer used during the FTP sessions.
Application
Decrease the window size.
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
802.3ab and 802.3z

47. The CK network administrator needs to determine what LAN devices to install on the CK network. What are two advantages of using Layer 2 Ethernet switches over hubs?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
802.3ab and 802.3z
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Show arp and Show interface

48. What is the IEEE standard associated with Gigabit Ethernet?
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
Switches increase the number of collision domains in the network.
802.3ab and 802.3z
An electrical pulse indicates that the collision has cleared.

49. Which of the following are true of Ethernet technology?
The sequence number in the TCP header.
Hosts use a logical bus topology
An electrical pulse indicates that the collision has cleared.
Certkiller B > trace

50. The Certkiller LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
HTTPS - SMTP - and TFTP
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
Switches increase the number of collision domains in the network.

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