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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 are types of flow control?
Physical Layer and Datalink Layer
Auto - On - and Desirable
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.
Buffering - Cut-through - and Congestion avoidance

2. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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.
It is used to prevent switching loops in networks with redundant switched routes.
Encapsulations PPP and authentication CHAP

3. Which of the following are spanning tree port states?
An electrical pulse indicates that the collision has cleared.
Transport
Learning - Listening - and Forwarding
To prevent switching loops in networks with redundant switched paths.

4. A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch?
HTTPS
Network
Port security
A cross-over cable

5. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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
Buffering - Cut-through - and Congestion avoidance
A hub and A repeater.

6. 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?
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
Encapsulations PPP and authentication CHAP
This is an Ethernet port operating at half duplex
Layer 4

7. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
Buffering - Cut-through - and Congestion avoidance
Layer 3
Show arp and Show interface

8. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
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.
Information about a route should never be sent back in the direction from which the original update came.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

9. CDP is running between two CK devices. What information is supplied by CDP?
STP
Device Identifiers - Capabilities list - Platform
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Layer 4

10. 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.
Hosts use a logical bus topology
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.
Application
SMTP - FTP - HTTP - and HTTPS

11. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A hub and A repeater.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

12. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
ARP and ICMP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Data link
This is an Ethernet port operating at half duplex

13. 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
Transport
Device Identifiers - Capabilities list - Platform
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 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?
Learning - Listening - and Forwarding
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.
Certkiller B > trace
802.3ab and 802.3z

15. 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?
Information about a route should never be sent back in the direction from which the original update came.
An additional broadcast domain will be created.
Packet switching - Packet filtering and Internetwork communication.
Serial0/1 is down - line protocol is down

16. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operations?
Application
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Encapsulations PPP and authentication CHAP
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.

17. 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
It operates without collisions and It provides faster data transfer
Fiber optic cable.
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.
Auto - On - and Desirable

18. Which of the following services use TCP?
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.
SMTP FTP and HTTP
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

19. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
ARP and ICMP
The system is malfunctioning.
The port is experiencing errors
To prevent switching loops in networks with redundant switched paths.

20. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Auto - On - and Desirable
The switch will forward the frame to a specific port
A cross-over cable

21. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Port security
STP
Show cdp neighbor detail
Information about a route should never be sent back in the direction from which the original update came.

22. 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?
VTP will allow switches to share VLAN configuration information
Sequence number - Window size - and Acknowledgment number
100 meters
Certkiller B > trace

23. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Switches - Bridges - and Routers
VLAN and Swtich
An electrical pulse indicates that the collision has cleared.
It is used to prevent switching loops in networks with redundant switched routes.

24. 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?
802.1Q and ISL
Show cdp neighbor detail
Auto - Desirable - and On
802.3ab and 802.3z

25. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Layer 3
The sequence number in the TCP header.
Path selections and Packet switching.
It is used to prevent switching loops in networks with redundant switched routes.

26. Which two of the following values does STP take into consideration when it elects the root bridge?
Switches - Bridges - and Routers
Congestion avoidance - Windowing and Buffering
A cross-over cable
The Bridgeg ID and The bridge priority

27. 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?
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.
Show arp and Show interface
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Layer 3

28. 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
Hosts use a logical bus topology
VLAN and Swtich
Layer 4
Duplex mismatch

29. 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 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.
To prevent switching loops in networks with redundant switched paths.
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.

30. 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?
The switch will forward the frame to a specific port
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Layer 3
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

31. Which protocol uses TCP port 443 at layer 4?
HTTPS
Auto - On - and Desirable
Network
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

32. 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?
The system is malfunctioning.
HTTPS
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

33. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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
SMTP FTP and HTTP
An electrical pulse indicates that the collision has cleared.

34. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
802.3ab and 802.3z
Application
The switch will forward the frame to a specific port
Auto - Desirable - and On

35. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Layer 3
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
STP
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.

36. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Application
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
A hub and A repeater.
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.

37. Which three of the protocols below belong to the application layer? (Select three answer choices)
ARP and ICMP
HTTPS - SMTP - and TFTP
The Bridgeg ID and The bridge priority
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.

38. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
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.
A broadcast address will never be the source address of a frame
Packet switching - Packet filtering and Internetwork communication.
Switches - Bridges - and Routers

39. 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?
802.1Q and ISL
Physical Layer and Datalink Layer
The sequence number in the TCP header.
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

40. Which of the following can lead to the contribution of LAN traffic congestion?
Increased latency and Filtering of all frame errors
Information about a route should never be sent back in the direction from which the original update came.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

41. What is the purpose of the spanning-tree algorithm in a switched LAN?
Application
Layer 3
Certkiller B > trace
To prevent switching loops in networks with redundant switched paths.

42. Which OSI layer header contains the address of a destination host that is on another network?
Application
Configure the switch so that it has a lower priority than other switches in the network.
Network
STP

43. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
TCP
Auto - On - and Desirable
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 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. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The network layer
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
A cross-over cable

45. 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.
The sequence number in the TCP header.
Configure the switch so that it has a lower priority than other switches in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

46. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
All switch and bridge ports are in either the forwarding or blocking state.
Telnet and FTP
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.
SMTP - FTP - HTTP - and HTTPS

47. 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?
Application
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.
Sequence number - Window size - and Acknowledgment number

48. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A cross-over cable
Data link
Layer 4

49. 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 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.
This is an Ethernet port operating at half duplex
The interfaces must be configured for NAT.
Application

50. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
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 sequence number in the TCP header.
The network layer
Network