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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. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
VTP
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.
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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

2. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Switches - Bridges - and Routers
An additional broadcast domain will be created.
Path selections and Packet switching.

3. 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?
Layer 3
SMTP FTP and HTTP
Show cdp neighbor detail
Configure the switch so that it has a lower priority than other switches in the network.

4. 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
To prevent switching loops in networks with redundant switched paths.
The sequence number in the TCP header.
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
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.

5. 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?
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.
Network
Switches increase the number of collision domains in the network.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

6. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
A cross-over cable
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Device Identifiers - Capabilities list - Platform

7. 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?
Network
ARP and ICMP
Show cdp neighbor detail
Learning - Listening - and Forwarding

8. 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?
Switches increase the number of collision domains in the network.
Device Identifiers - Capabilities list - Platform
Application
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.

9. 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?
Auto - On - and Desirable
Data link
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
Information about a route should never be sent back in the direction from which the original update came.

10. 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 will forward the frame to a specific port
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The interfaces must be configured for NAT.
Duplex mismatch

11. Which two of the following values does STP take into consideration when it elects the root bridge?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The Bridgeg ID and The bridge priority

12. 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
All switch and bridge ports are in either the forwarding or blocking state.
The Bridgeg ID and The bridge priority
Information about a route should never be sent back in the direction from which the original update came.

13. CDP is running between two CK devices. What information is supplied by CDP?
It is the sum of the costs based on bandwidth
Data link
Device Identifiers - Capabilities list - Platform
A broadcast address will never be the source address of a frame

14. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Serial0/1 is down - line protocol is down
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.
Transport
HTTPS

15. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
The sequence number in the TCP header.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Auto - Desirable - and On
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.

16. 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?
802.3ab and 802.3z
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
Congestion avoidance - Windowing and Buffering

17. 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.
SMTP FTP and HTTP
Auto - On - and Desirable
It operates without collisions and It provides faster data transfer

18. Which of the following correctly describe steps in the OSI date encapsulation process?
To prevent switching loops in networks with redundant switched paths.
In an improperly implemented redundant topology
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.

19. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The interfaces must be configured for NAT.
Application
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

20. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
Network
Configure the switch so that it has lower priority than other switches in the network
An electrical pulse indicates that the collision has cleared.

21. Which of the following are types of flow control?
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
Buffering - Cut-through - and Congestion avoidance
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Application

22. 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.
Show arp and Show interface
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Auto - On - and Desirable

23. 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)
It will prevent segment 1's broadcasts from getting to segment 2.
Data link
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

24. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Telnet and FTP
Layer 3

25. 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?
The system is malfunctioning.
The Bridgeg ID and The bridge priority
Hosts use a logical bus topology
The switch will forward the frame to a specific port

26. 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?
Application
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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
TCP

27. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
802.3ab and 802.3z
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.
Network
An electrical pulse indicates that the collision has cleared.

28. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Decrease the window size.
Serial0/1 is down - line protocol is down
To allow remote management of the switch.

29. 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.
A hub and A repeater.
To prevent switching loops in networks with redundant switched paths.
Switches increase the number of collision domains in the network.

30. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
It is the sum of the costs based on bandwidth
The network layer
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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

31. 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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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 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.
Source Port - Acknowledgment Number - and Window

32. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
It is the sum of the costs based on bandwidth
The system is malfunctioning.
Encapsulations PPP and authentication CHAP

33. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
A broadcast address will never be the source address of a frame
Path selections and Packet switching.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
100 meters

34. 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?
Path selections and Packet switching.
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
Configure the switch so that it has a lower priority than other switches in the network.
Show arp and Show interface

35. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Auto - On - and Desirable
Layer 4
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
MAC Address and Bridge Priority

36. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Device Identifiers - Capabilities list - Platform
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

37. 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
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.
Fiber optic cable.
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

38. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
The network layer
A broadcast address will never be the source address of a frame
Show cdp neighbor detail
Congestion avoidance - Windowing and Buffering

39. 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 network layer
Hosts use a logical bus topology
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 - Bridges - and Routers

40. 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?
Network
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

41. 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
ARP and ICMP
Switches - Bridges - and Routers
100 meters
VLAN and Swtich

42. Which fields are included in the TCP header?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
To prevent switching loops in networks with redundant switched paths.
Fiber optic cable.
Source Port - Acknowledgment Number - and Window

43. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
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
Configure the switch so that it has a lower priority than other switches in the network.

44. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
The system is malfunctioning.
Information about a route should never be sent back in the direction from which the original update came.
Physical Layer and Datalink Layer
Encapsulations PPP and authentication CHAP

45. 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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46. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Learning - Listening - and Forwarding
The port is experiencing errors
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.
Path selections and Packet switching.

47. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
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.
Auto - Desirable - and On
Data link
SMTP - FTP - HTTP - and HTTPS

48. 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?
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
Sequence number - Window size - and Acknowledgment number
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
HTTPS

49. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
In an improperly implemented redundant topology
Transport
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

50. 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
Information about a route should never be sent back in the direction from which the original update came.
Decrease the window size.
SMTP FTP and HTTP