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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
Network
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

2. 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?
Learning - Listening - and Forwarding
To allow remote management of the switch.
Physical Layer and Datalink Layer
Data link

3. 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?
Switches - Bridges - and Routers
Source Port - Acknowledgment Number - and Window
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
It will prevent segment 1's broadcasts from getting to segment 2.

4. 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?
The interfaces must be configured for NAT.
VTP
Fiber optic cable.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

5. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Data link
Telnet and FTP

6. In a switched LAN network - What is the Spanning-Tree algorithm used for?
VTP will allow switches to share VLAN configuration information
Increased latency and Filtering of all frame errors
It is used to prevent switching loops in networks with redundant switched routes.
The port is experiencing errors

7. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Layer 4
VLAN and Swtich
This is an Ethernet port operating at half duplex

8. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Device Identifiers - Capabilities list - Platform
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.
Layer 4
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

9. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
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.
The port is experiencing errors
It is used to prevent switching loops in networks with redundant switched routes.

10. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
Layer 4
VTP will allow switches to share VLAN configuration information
Configure the switch so that it has a lower priority than other switches in the network.

11. 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.
802.1Q and ISL
Application
Certkiller B > trace
Telnet and FTP

12. 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
It is the sum of the costs based on bandwidth
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

13. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
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.
Auto - On - and Desirable
Fiber optic cable.
Congestion avoidance - Windowing and Buffering

14. Which of the following are spanning tree port states?
Path selections and Packet switching.
Switches - Bridges - and Routers
It is used to prevent switching loops in networks with redundant switched routes.
Learning - Listening - and Forwarding

15. The Certkiller network administrator wants to use a router named CK1 to segment the local network. What are some of the advantages of using CK1 to segment the network? (Choose two)
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
ARP and ICMP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
SMTP FTP and HTTP

16. 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
Layer 3
Configure the switch so that it has lower priority than other switches in the network
Path selections and Packet switching.

17. As a CCNA candidate - you must know the various layers of the OSI model. At which layers of the OSI model do Wide Area Networks operate in?
Congestion avoidance - Windowing and Buffering
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
802.3ab and 802.3z
Physical Layer and Datalink Layer

18. Which three of the protocols below belong to the application layer? (Select three answer choices)
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Physical Layer and Datalink Layer
HTTPS - SMTP - and TFTP
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to

19. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
MAC Address and Bridge Priority
Auto - On - and Desirable
A cross-over cable
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.

20. The Certkiller network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?
Information about a route should never be sent back in the direction from which the original update came.
Data link
ARP and ICMP
Switches - Bridges - and Routers

21. 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?
A cross-over cable
Certkiller B > trace
It will prevent segment 1's broadcasts from getting to segment 2.
HTTPS - SMTP - and TFTP

22. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
The Bridgeg ID and The bridge priority
Buffering - Cut-through - and Congestion avoidance
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.

23. Two buildings on the London campus of a CK corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. CK is concerned about possible problems from voltage potential differences between the two buldings. Which media type shou
Fiber optic cable.
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
Application
This is an Ethernet port operating at half duplex

24. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The network layer
The sequence number in the TCP header.

25. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
ARP and ICMP
A broadcast address will never be the source address of a frame
Application

26. Which of the following correctly describe the various functions and virtues of a router?
Serial0/1 is down - line protocol is down
The sequence number in the TCP header.
Packet switching - Packet filtering and Internetwork communication.
A cross-over cable

27. 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?
An electrical pulse indicates that the collision has cleared.
Switches increase the number of collision domains in the network.
The network layer
Layer 4

28. 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?
Sequence number - Window size - and Acknowledgment number
Serial0/1 is down - line protocol is down
Auto - On - and Desirable
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.

29. Which of the protocols below use TCP at the transport layer?
CertK Switch(config)# ip default-gateway 192.168.1.115
SMTP - FTP - HTTP - and HTTPS
Show cdp neighbor detail
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

30. Which of the following can lead to the contribution of LAN traffic congestion?
STP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Serial0/1 is down - line protocol is down
Layer 4

31. 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
Layer 4
It is the sum of the costs based on bandwidth
HTTPS
Show arp and Show interface

32. The Certkiller network administrator needs to a switch named CK1 to become the root bridge for a redundant path switched network. What can be done to ensure that CK1 will always assume the role as the root bridge?
Configure the switch so that it has lower priority than other switches in the network
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
Data link

33. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
A broadcast address will never be the source address of a frame
Network
The port is experiencing errors

34. While troubleshooting a network connectivity problem - a Certkiller technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However - when the ping command is issued from the works
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
Layer 4
Data link
The network layer

35. Assuming you build networks to exact specifications - What is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?
Layer 3
Encapsulations PPP and authentication CHAP
Congestion avoidance - Windowing and Buffering
100 meters

36. You want to upgrade the Certkiller LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?
Layer 4
CertK Switch(config)# ip default-gateway 192.168.1.115
Fiber optic cable.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

37. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
TCP
The network layer
Layer 4
It will prevent segment 1's broadcasts from getting to segment 2.

38. You want to influence the root bridge selection within the Certkiller LAN. Which two values are used by spanning tree protocol to elect a root bridge? (Choose two.)
MAC Address and Bridge Priority
Telnet and FTP
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
CertK Switch(config)# ip default-gateway 192.168.1.115

39. 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?
HTTPS
A cross-over cable
Layer 4
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

40. Which two of the following values does STP take into consideration when it elects the root bridge?
TCP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
HTTPS - SMTP - and TFTP
The Bridgeg ID and The bridge priority

41. Which of the following services use TCP?
A cross-over cable
Layer 4
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.
SMTP FTP and HTTP

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?
Packet switching - Packet filtering and Internetwork communication.
Configure the switch so that it has lower priority than other switches in the network
The port is experiencing errors
Decrease the window size.

43. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
SMTP FTP and HTTP
Transport
Certkiller B > trace
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

44. A Certkiller switch is configured with all ports assigned to VLAN 2. In addition - all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?
Fiber optic cable.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
An additional broadcast domain will be created.
Network

45. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
Layer 4
Duplex mismatch
Network

46. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
To allow remote management of the switch.
Information about a route should never be sent back in the direction from which the original update came.
Configure the switch so that it has lower priority than other switches in the network
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

47. 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?
SMTP FTP and HTTP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
802.1Q and ISL

48. 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?
Configure the switch so that it has lower priority than other switches in the network
TCP
A hub and A repeater.
The switch will forward the frame to a specific port

49. A host computer has been correctly configured with a static IP address - but the default gateway is incorrectly set. Which layer of the OSI model will be first effected by this configuration error?
It is the sum of the costs based on bandwidth
Certkiller B > trace
Network
Layer 3

50. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
In an improperly implemented redundant topology