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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. What are two characteristics of 'store and forward' switching?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Device Identifiers - Capabilities list - Platform
Switches increase the number of collision domains in the network.
The system is malfunctioning.

2. 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?
Switches - Bridges - and Routers
A hub and A repeater.
This is an Ethernet port operating at half duplex
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

3. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
MAC Address and Bridge Priority
It is used to prevent switching loops in networks with redundant switched routes.
Path selections and Packet switching.
Layer 4

4. 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?
The port is experiencing errors
Layer 4
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Layer 3

5. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Switches increase the number of collision domains in the network.
VLAN and Swtich

6. 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?
MAC Address and Bridge Priority
The sequence number in the TCP header.
Encapsulations PPP and authentication CHAP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

7. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Congestion avoidance - Windowing and Buffering
Serial0/1 is down - line protocol is down
The sequence number in the TCP header.

8. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
VTP
Show cdp neighbor detail
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.

9. 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?
Switches - Bridges - and Routers
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Physical Layer and Datalink Layer
The interfaces must be configured for NAT.

10. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
SMTP - FTP - HTTP - and HTTPS
VTP will allow switches to share VLAN configuration information
Information about a route should never be sent back in the direction from which the original update came.
The system is malfunctioning.

11. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Sequence number - Window size - and Acknowledgment number
Certkiller B > trace
An additional broadcast domain will be created.
It operates without collisions and It provides faster data transfer

12. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
To allow remote management of the switch.
A hub and A repeater.
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.
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

13. when files are transferred between a host and an FTP server - the data is divided into smaller pieces of transmission. As these pieces arrive at the destination host they must be reassembled to reconstruct the original file. What provides for the rea
The sequence number in the TCP header.
Hosts use a logical bus topology
The switch will forward the frame to a specific port
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.

14. Which of the following correctly describe the various functions and virtues of a router?
Switches increase the number of collision domains in the network.
Packet switching - Packet filtering and Internetwork communication.
A cross-over cable
Data link

15. Which two of the following values does STP take into consideration when it elects the root bridge?
Sequence number - Window size - and Acknowledgment number
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.
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 Bridgeg ID and The bridge priority

16. 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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
To prevent switching loops in networks with redundant switched paths.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

17. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
HTTPS
TCP

18. By default - which of the following factors determines the spanning-tree path cost?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
It is the sum of the costs based on bandwidth
Serial0/1 is down - line protocol is down
Switches increase the number of collision domains in the network.

19. 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?
Layer 3
Congestion avoidance - Windowing and Buffering
The switch will forward the frame to a specific port
Layer 4

20. 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?
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.
Telnet and FTP
VTP

21. Both bridges are switches are being used throughout the CK LAN. Which of the following statements are true regarding bridges and switches in this network?
The Bridgeg ID and The bridge priority
The interfaces must be configured for NAT.
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.
Application

22. 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.)
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The port is experiencing errors
Configure the switch so that it has a lower priority than other switches in the network.
MAC Address and Bridge Priority

23. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Auto - Desirable - and On
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Auto - On - and Desirable
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.

24. On a half-duplex Ethernet LAN - two hosts attempt to send data simultaneously - resulting in a collision. Following this collision - what will the hosts do?
An electrical pulse indicates that the collision has cleared.
It will prevent segment 1's broadcasts from getting to segment 2.
This is an Ethernet port operating at half duplex
Port security

25. 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 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
The network layer
Application
An electrical pulse indicates that the collision has cleared.

26. 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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The network 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.
STP

27. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
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
All switch and bridge ports are in either the forwarding or blocking state.
The system is malfunctioning.
Layer 4

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?
A hub and A repeater.
Decrease the window size.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The sequence number in the TCP header.

29. A Certkiller Ethernet switch receives a unicast frame with a destination MAC that IS listed in the switch table. What will this switch do with the frame?
To allow remote management of the switch.
The switch will forward the frame to a specific port
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The Bridgeg ID and The bridge priority

30. 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?
Switches increase the number of collision domains in the network.
Certkiller B > trace
This is an Ethernet port operating at half duplex
Auto - On - and Desirable

31. 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.
To prevent switching loops in networks with redundant switched paths.
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.
SMTP FTP and HTTP

32. 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
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.
Encapsulations PPP and authentication CHAP
Auto - On - and Desirable

33. Which of the following are types of flow control?
Information about a route should never be sent back in the direction from which the original update came.
Application
Layer 3
Buffering - Cut-through - and Congestion avoidance

34. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
It is the sum of the costs based on bandwidth
Physical Layer and Datalink Layer
Switches increase the number of collision domains in the network.
Congestion avoidance - Windowing and Buffering

35. 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
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
The switch will forward the frame to a specific port
HTTPS - SMTP - and TFTP

36. 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 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.
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
The port is experiencing errors
Packet switching - Packet filtering and Internetwork communication.

37. 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
Hosts use a logical bus topology
Switches - Bridges - and Routers
Show arp and Show interface
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

38. Which of the following correctly describe steps in the OSI date encapsulation process?
Encapsulations PPP and authentication CHAP
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.
A broadcast address will never be the source address of a frame
SMTP - FTP - HTTP - and HTTPS

39. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
802.1Q and ISL
VLAN and Swtich
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Data link

40. 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
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.
Device Identifiers - Capabilities list - Platform
Increased latency and Filtering of all frame errors
An additional broadcast domain will be created.

41. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Fiber optic cable.
Switches - Bridges - and Routers
Auto - Desirable - and On

42. 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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
HTTPS - SMTP - and TFTP
Data link
Encapsulations PPP and authentication CHAP

43. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
MAC Address and Bridge Priority
Encapsulations PPP and authentication CHAP
Auto - Desirable - and On
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.

44. What is the IEEE standard associated with Gigabit Ethernet?
Congestion avoidance - Windowing and Buffering
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The port is experiencing errors
802.3ab and 802.3z

45. 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?
To prevent switching loops in networks with redundant switched paths.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
An additional broadcast domain will be created.
STP

46. Network equipment supporting the use of flow control mechanisms has been recently installed in the CK network. What is the purpose of flow control in a data network?
Data link
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
Certkiller B > trace
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

47. Which of the following services use TCP?
A hub and A repeater.
SMTP FTP and HTTP
TCP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

48. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
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.
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.
All switch and bridge ports are in either the forwarding or blocking state.
Sequence number - Window size - and Acknowledgment number

49. Which of the following can lead to the contribution of LAN traffic congestion?
MAC Address and Bridge Priority
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
It is used to prevent switching loops in networks with redundant switched routes.
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.

50. CDP is running between two CK devices. What information is supplied by CDP?
Configure the switch so that it has a lower priority than other switches in the network.
Path selections and Packet switching.
Information about a route should never be sent back in the direction from which the original update came.
Device Identifiers - Capabilities list - Platform