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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. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
An electrical pulse indicates that the collision has cleared.
Port security
Path selections and Packet switching.
Telnet and FTP

2. 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?
A hub and A repeater.
Switches increase the number of collision domains in the network.
HTTPS - SMTP - and TFTP
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.

3. 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
HTTPS
Serial0/1 is down - line protocol is down
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Source Port - Acknowledgment Number - and Window

4. 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.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
It is used to prevent switching loops in networks with redundant switched routes.

5. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
A cross-over cable
Configure the switch so that it has a lower priority than other switches in the network.
Layer 4
Encapsulations PPP and authentication CHAP

6. 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 switch will forward the frame to a specific port
Telnet and FTP
A broadcast address will never be the source address of a frame

7. Which of the following correctly describe the various functions and virtues of a router?
Device Identifiers - Capabilities list - Platform
HTTPS
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Packet switching - Packet filtering and Internetwork communication.

8. 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
Network
Telnet and FTP
100 meters

9. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Learning - Listening - and Forwarding
Telnet and FTP
A broadcast address will never be the source address of a frame
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

10. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
It will prevent segment 1's broadcasts from getting to segment 2.
Sequence number - Window size - and Acknowledgment number
An electrical pulse indicates that the collision has cleared.

11. 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?
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
To allow remote management of the switch.
Application
STP

12. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
The port is experiencing errors
An electrical pulse indicates that the collision has cleared.
Information about a route should never be sent back in the direction from which the original update came.
Certkiller B > trace

13. 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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14. 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?
Switches - Bridges - and Routers
Port security
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Encapsulations PPP and authentication CHAP

15. 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 allow remote management of the switch.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
To prevent switching loops in networks with redundant switched paths.

16. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Data link
Layer 4
Serial0/1 is down - line protocol is down

17. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Switches increase the number of collision domains in the network.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
VLAN and Swtich
Increased latency and Filtering of all frame errors

18. 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
Port security
It operates without collisions and It provides faster data transfer
SMTP FTP and HTTP

19. 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?
Data link
A broadcast address will never be the source address of a frame
The network layer
The Bridgeg ID and The bridge priority

20. What is the IEEE standard associated with Gigabit Ethernet?
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.
STP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
802.3ab and 802.3z

21. 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)
Buffering - Cut-through - and Congestion avoidance
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
Data link

22. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
MAC Address and Bridge Priority
All switch and bridge ports are in either the forwarding or blocking state.
An electrical pulse indicates that the collision has cleared.
Layer 4

23. 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
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 network layer
An electrical pulse indicates that the collision has cleared.
Data link

24. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
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.
Information about a route should never be sent back in the direction from which the original update came.
A broadcast address will never be the source address of a frame
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

25. 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 Bridgeg ID and The bridge priority
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 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.
It is the sum of the costs based on bandwidth

26. Which fields are included in the TCP header?
The system is malfunctioning.
Source Port - Acknowledgment Number - and Window
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

27. 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.
Transport
Show arp and Show interface
All switch and bridge ports are in either the forwarding or blocking state.

28. 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.
The sequence number in the TCP header.
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.

29. 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.
Auto - Desirable - and On
Configure the switch so that it has lower priority than other switches in the network
Layer 4

30. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
A hub and A repeater.
Buffering - Cut-through - and Congestion avoidance
HTTPS - SMTP - and TFTP

31. 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
VLAN and Swtich
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

32. CDP is running between two CK devices. What information is supplied by CDP?
Fiber optic cable.
Device Identifiers - Capabilities list - Platform
An electrical pulse indicates that the collision has cleared.
Configure the switch so that it has lower priority than other switches in the network

33. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Duplex mismatch
Application
Switches - Bridges - and Routers
It is used to prevent switching loops in networks with redundant switched routes.

34. Which of the protocols below use TCP at the transport layer?
Learning - Listening - and Forwarding
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
SMTP - FTP - HTTP - and HTTPS
Increased latency and Filtering of all frame errors

35. 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?
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.
Decrease the window size.
Network
100 meters

36. 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?
Duplex mismatch
Transport
To allow remote management of the switch.
To prevent switching loops in networks with redundant switched paths.

37. 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?
STP
The network layer
Certkiller B > trace
Layer 3

38. 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?
Increased latency and Filtering of all frame errors
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
Device Identifiers - Capabilities list - Platform

39. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
A hub and A repeater.
Configure the switch so that it has lower priority than other switches in the network
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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.

40. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Show cdp neighbor detail
Congestion avoidance - Windowing and Buffering
802.1Q and ISL
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.

41. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
SMTP FTP and HTTP
The system is malfunctioning.
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

42. 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?
HTTPS - SMTP - and TFTP
This is an Ethernet port operating at half duplex
Configure the switch so that it has a 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.

43. Which OSI layer header contains the address of a destination host that is on another network?
HTTPS
Network
To allow remote management of the switch.
Layer 4

44. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
STP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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.
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.

45. 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.)
An electrical pulse indicates that the collision has cleared.
Encapsulations PPP and authentication CHAP
Layer 4
MAC Address and Bridge Priority

46. Which of the following can lead to the contribution of LAN traffic congestion?
The network layer
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
Application

47. 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?
VLAN and Swtich
It operates without collisions and It provides faster data transfer
100 meters
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.

48. 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?
The Bridgeg ID and The bridge priority
802.1Q and ISL
An additional broadcast domain will be created.
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

49. 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
Encapsulations PPP and authentication CHAP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Telnet and FTP

50. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Configure the switch so that it has lower priority than other switches in the network
Path selections and Packet switching.
802.1Q and ISL
A cross-over cable