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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. 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?
SMTP FTP and HTTP
It operates without collisions and It provides faster data transfer
Fiber optic cable.
The interfaces must be configured for NAT.

2. Which two of the following values does STP take into consideration when it elects the root bridge?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The Bridgeg ID and The bridge priority
The system is malfunctioning.
An electrical pulse indicates that the collision has cleared.

3. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Layer 3
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Application
Switches - Bridges - and Routers

4. 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
Path selections and Packet switching.
Application
Port security

5. 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.
VTP
Decrease the window size.
Sequence number - Window size - and Acknowledgment number

6. CDP is running between two CK devices. What information is supplied by CDP?
Switches - Bridges - and Routers
All switch and bridge ports are in either the forwarding or blocking state.
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

7. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Application
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

8. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
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
A cross-over cable
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

9. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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.
Source Port - Acknowledgment Number - and Window
The network layer
SMTP FTP and HTTP

10. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
HTTPS
100 meters
Layer 4
802.3ab and 802.3z

11. Which of the protocols below use TCP at the transport layer?
All switch and bridge ports are in either the forwarding or blocking state.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
SMTP - FTP - HTTP - and HTTPS
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

12. 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?
A broadcast address will never be the source address of a frame
The switch will forward the frame to a specific port
An electrical pulse indicates that the collision has cleared.
Configure the switch so that it has a lower priority than other switches in the network.

13. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
Buffering - Cut-through - and Congestion avoidance
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.
Layer 4

14. Which OSI layer header contains the address of a destination host that is on another network?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Network
Show arp and Show interface
A cross-over cable

15. 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
Learning - Listening - and Forwarding
Buffering - Cut-through - and Congestion avoidance
The sequence number in the TCP header.

16. Which of the following are spanning tree port states?
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
Certkiller B > trace
VTP will allow switches to share VLAN configuration information
Learning - Listening - and Forwarding

17. 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?
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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

18. 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
Physical Layer and Datalink Layer
Show cdp neighbor detail
HTTPS

19. Which of the following are types of flow control?
SMTP FTP and HTTP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Layer 3
Buffering - Cut-through - and Congestion avoidance

20. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
Fiber optic cable.
Switches increase the number of collision domains in the 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.

21. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
Network
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
A hub and A repeater.

22. What kind of cable should be used to establish a trunked line between two Catalyst switches?
SMTP FTP and HTTP
Auto - On - and Desirable
A cross-over cable
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

23. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
An additional broadcast domain will be created.
Congestion avoidance - Windowing and Buffering
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
A cross-over cable

24. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The network layer
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

25. 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?
Application
Switches increase the number of collision domains 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
To allow remote management of the switch.

26. 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?
An additional broadcast domain will be created.
Application
STP
802.3ab and 802.3z

27. 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?
Information about a route should never be sent back in the direction from which the original update came.
Fiber optic cable.
STP
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

28. 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?
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 interfaces must be configured for NAT.
MAC Address and Bridge Priority
Show arp and Show interface

29. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
STP
In an improperly implemented redundant topology
It operates without collisions and It provides faster data transfer
Configure the switch so that it has lower priority than other switches in the network

30. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
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.
Serial0/1 is down - line protocol is down
Layer 4

31. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Physical Layer and Datalink Layer
To allow remote management of the switch.
Path selections and Packet switching.

32. 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)
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Buffering - Cut-through - and Congestion avoidance
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
It operates without collisions and It provides faster data transfer

33. 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?
SMTP - FTP - HTTP - and HTTPS
MAC Address and Bridge Priority
Certkiller B > trace
The sequence number in the TCP header.

34. 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?
This is an Ethernet port operating at half duplex
Show cdp neighbor detail
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 will prevent segment 1's broadcasts from getting to segment 2.

35. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
A broadcast address will never be the source address of a frame
Source Port - Acknowledgment Number - and Window
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The switch will forward the frame to a specific port

36. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Application
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
802.1Q and ISL

37. 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 interfaces must be configured for NAT.
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.
An electrical pulse indicates that the collision has cleared.
802.3ab and 802.3z

38. 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?
Layer 4
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
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.

39. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Duplex mismatch
Switches - Bridges - and Routers
Data link
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

40. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
It operates without collisions and It provides faster data transfer
Layer 4
The switch will forward the frame to a specific port

41. What is the IEEE standard associated with Gigabit Ethernet?
Source Port - Acknowledgment Number - and Window
Buffering - Cut-through - and Congestion avoidance
Information about a route should never be sent back in the direction from which the original update came.
802.3ab and 802.3z

42. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
To prevent switching loops in networks with redundant switched paths.
Data link
Source Port - Acknowledgment Number - and Window
Sequence number - Window size - and Acknowledgment number

43. 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.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Decrease the window size.
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.

44. Which protocol uses TCP port 443 at layer 4?
Physical Layer and Datalink Layer
SMTP - FTP - HTTP - and HTTPS
HTTPS
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

45. 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?
100 meters
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.
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.
Network

46. 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
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.
Packet switching - Packet filtering and Internetwork communication.
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.

47. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
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
ARP and ICMP
Duplex mismatch
Serial0/1 is down - line protocol is down

48. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Sequence number - Window size - and Acknowledgment number
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Network
Layer 4

49. Which of the following correctly describe steps in the OSI date encapsulation process?
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.
Hosts use a logical bus topology
MAC Address and Bridge Priority
Certkiller B > trace

50. 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
Data link
Hosts use a logical bus topology
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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router