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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 the following correctly describe the various functions and virtues of a router?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Packet switching - Packet filtering and Internetwork communication.
Layer 4
Switches - Bridges - and Routers

2. 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.
Switches increase the number of collision domains in the network.
Congestion avoidance - Windowing and Buffering

3. What kind of cable should be used to establish a trunked line between two Catalyst switches?
ARP and ICMP
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.
A cross-over cable

4. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
ARP and ICMP
An additional broadcast domain will be created.

5. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
Network
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private

6. 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
To allow remote management of the switch.
Switches increase the number of collision domains in the network.
The network layer
Application

7. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Data link
An additional broadcast domain will be created.
In an improperly implemented redundant topology
Path selections and Packet switching.

8. Which fields are included in the TCP header?
Data link
Transport
Layer 4
Source Port - Acknowledgment Number - and Window

9. 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?
HTTPS
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
An additional broadcast domain will be created.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

10. 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?
Show cdp neighbor detail
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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Layer 3

11. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Switches - Bridges - and Routers
Decrease the window size.
Application
Data link

12. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
100 meters
Source Port - Acknowledgment Number - and Window
Layer 4
ARP and ICMP

13. 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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

14. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
MAC Address and Bridge Priority
VTP will allow switches to share VLAN configuration information
Path selections and Packet switching.
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.

15. 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 port is experiencing errors
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.
Serial0/1 is down - line protocol is down
HTTPS

16. Which of the following are true of Ethernet technology?
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.
A broadcast address will never be the source address of a frame
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Hosts use a logical bus topology

17. A new switch is installed in the Certkiller network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network. Which of the conditions below have to be met in o
It is used to prevent switching loops in networks with redundant switched routes.
Serial0/1 is down - line protocol is down
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.
Hosts use a logical bus topology

18. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Show cdp neighbor detail
A broadcast address will never be the source address of a frame
In an improperly implemented redundant topology
Decrease the window size.

19. 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?
Configure the switch so that it has lower priority than other switches in the network
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Application
802.3ab and 802.3z

20. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
The Bridgeg ID and The bridge priority
The sequence number in the TCP header.
TCP
VTP will allow switches to share VLAN configuration information

21. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Network
Information about a route should never be sent back in the direction from which the original update came.
It operates without collisions and It provides faster data transfer
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.

22. 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?
Application
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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
Data link

23. A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role of the Root Bridge?
Layer 4
Data link
Configure the switch so that it has a lower priority than other switches in the network.
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

24. What is the IEEE standard associated with Gigabit Ethernet?
Certkiller B > trace
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
802.3ab and 802.3z
Port security

25. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
SMTP - FTP - HTTP - and HTTPS
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Learning - Listening - and Forwarding

26. 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?
HTTPS
802.3ab and 802.3z
VTP
To allow remote management of the switch.

27. A Certkiller technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the sh
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.
Data link
Learning - Listening - and Forwarding

28. 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?
In an improperly implemented redundant topology
802.1Q and ISL
An electrical pulse indicates that the collision has cleared.
A hub and A repeater.

29. Which of the following can lead to the contribution of LAN traffic congestion?
Data link
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Information about a route should never be sent back in the direction from which the original update came.
Switches increase the number of collision domains in the network.

30. 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?
Transport
The interfaces must be configured for NAT.
Application
An electrical pulse indicates that the collision has cleared.

31. 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?
Physical Layer and Datalink Layer
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.
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
TCP

32. 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?
Physical Layer and Datalink Layer
Switches - Bridges - and Routers
100 meters
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

33. 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?
An electrical pulse indicates that the collision has cleared.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
To prevent switching loops in networks with redundant switched paths.
Switches increase the number of collision domains in the network.

34. 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?
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.
Certkiller B > trace
Auto - On - and Desirable
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

35. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Network
A cross-over cable
802.1Q and ISL
Switches increase the number of collision domains in the network.

36. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
VTP will allow switches to share VLAN configuration information
802.1Q and ISL
MAC Address and Bridge Priority
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.

37. CDP is running between two CK devices. What information is supplied by CDP?
The interfaces must be configured for NAT.
Configure the switch so that it has a lower priority than other switches in the network.
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.
Device Identifiers - Capabilities list - Platform

38. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
802.3ab and 802.3z
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Switches increase the number of collision domains in the network.
Auto - On - and Desirable

39. 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.
All switch and bridge ports are in either the forwarding or blocking state.
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
In an improperly implemented redundant topology
Application

40. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
To allow remote management of the switch.
A broadcast address will never be the source address of a frame
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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.

41. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It is used to prevent switching loops in networks with redundant switched routes.
The switch will forward the frame to a specific port
Switches - Bridges - and Routers
To prevent switching loops in networks with redundant switched paths.

42. Certkiller is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions - the company needs to make sure that the phone traffic is on a different network
The Bridgeg ID and The bridge priority
Configure the switch so that it has lower priority than other switches in the network
VLAN and Swtich
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

43. 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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44. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
It will prevent segment 1's broadcasts from getting to segment 2.
Network
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
ARP and ICMP

45. By default - which of the following factors determines the spanning-tree path cost?
VTP will allow switches to share VLAN configuration information
It is the sum of the costs based on bandwidth
STP
The interfaces must be configured for NAT.

46. 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?
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.
Sequence number - Window size - and Acknowledgment number
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The port is experiencing errors

47. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
802.1Q and ISL
It operates without collisions and It provides faster data transfer
Switches increase the number of collision domains in the network.

48. What is the purpose of the spanning-tree algorithm in a switched LAN?
SMTP - FTP - HTTP - and HTTPS
Hosts use a logical bus topology
To prevent switching loops in networks with redundant switched paths.
The interfaces must be configured for NAT.

49. Which protocol uses TCP port 443 at layer 4?
The network layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
HTTPS
The sequence number in the TCP header.

50. Which of the following devices can the Certkiller network administrator use to segment the LAN?
An electrical pulse indicates that the collision has cleared.
All switch and bridge ports are in either the forwarding or blocking state.
Switches - Bridges - and Routers
In an improperly implemented redundant topology