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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. Some of the older Certkiller switches store the entire frame before forwarding it to the destination. What are two effects on network performance of configuring a switch to do this?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The Bridgeg ID and The bridge priority
Increased latency and Filtering of all frame errors
Packet switching - Packet filtering and Internetwork communication.

2. 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?
This is an Ethernet port operating at half duplex
Buffering - Cut-through - and Congestion avoidance
The interfaces must be configured for NAT.
Network

3. You need to configure two Certkiller switches to exchange VLAN information. Which protocol provides a method of sharing VLAN configuration information between these two switches?
HTTPS - SMTP - and TFTP
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
VTP
Encapsulations PPP and authentication CHAP

4. Which of the following devices can the Certkiller network administrator use to segment the LAN?
TCP
Sequence number - Window size - and Acknowledgment number
Switches - Bridges - and Routers
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.

5. 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?
Switches - Bridges - and Routers
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Buffering - Cut-through - and Congestion avoidance
The network layer

6. Which of the following services use TCP?
An electrical pulse indicates that the collision has cleared.
VTP
SMTP FTP and HTTP
STP

7. What is the purpose of the spanning-tree algorithm in a switched LAN?
The system is malfunctioning.
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
To prevent switching loops in networks with redundant switched paths.

8. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Show arp and Show interface
Show cdp neighbor detail
Data link

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

10. 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 is the sum of the costs based on bandwidth
Encapsulations PPP and authentication CHAP
Port security
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

11. The Certkiller network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?
The port is experiencing errors
Switches - Bridges - and Routers
ARP and ICMP
Fiber optic cable.

12. 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?
ARP and ICMP
This is an Ethernet port operating at half duplex
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Transport

13. 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 throughput than can half-duplex Ethernet of the same bandwidth
Decrease the window size.
The network layer

14. 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.
Duplex mismatch
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.
VLAN and Swtich

15. Certkiller users have noticed extremely slow network performance - intermittent connectivity - and connection losses. After entering the 'show interfaces' command - you notice that the Ethernet interface is configured as 100 Mbps full-duplex and that
A cross-over cable
Hosts use a logical bus topology
Auto - On - and Desirable
Duplex mismatch

16. Which of the following are types of flow control?
VTP
Buffering - Cut-through - and Congestion avoidance
802.3ab and 802.3z
Telnet and FTP

17. 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?
The network layer
100 meters
Learning - Listening - and Forwarding
The switch will forward the frame to a specific port

18. The Certkiller network administrator needs to a switch named CK1 to become the root bridge for a redundant path switched network. What can be done to ensure that CK1 will always assume the role as the root bridge?
Telnet and FTP
Configure the switch so that it has lower priority than other switches in the network
An additional broadcast domain will be created.
Data link

19. 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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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?
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.
Buffering - Cut-through - and Congestion avoidance
Telnet and FTP
Show arp and Show interface

21. CDP is running between two CK devices. What information is supplied by CDP?
It operates without collisions and It provides faster data transfer
Device Identifiers - Capabilities list - Platform
Auto - On - and Desirable
The network layer

22. 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?
Auto - On - and Desirable
Physical Layer and Datalink Layer
This is an Ethernet port operating at half duplex
TCP

23. 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?
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
It is the sum of the costs based on bandwidth
Network
Layer 3

24. 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
TCP
VLAN and Swtich
Show cdp neighbor detail
Information about a route should never be sent back in the direction from which the original update came.

25. 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?
Data link
Switches increase the number of collision domains 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.
Path selections and Packet switching.

26. Which fields are included in the TCP header?
802.3ab and 802.3z
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Source Port - Acknowledgment Number - and Window
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.

27. What is the IEEE standard associated with Gigabit Ethernet?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
802.3ab and 802.3z
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
All switch and bridge ports are in either the forwarding or blocking state.

28. 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?
Configure the switch so that it has a lower priority than other switches in the network.
Path selections and Packet switching.
An electrical pulse indicates that the collision has cleared.
To prevent switching loops in networks with redundant switched paths.

29. 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 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.
Port security
Decrease the window size.

30. 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?
Serial0/1 is down - line protocol is down
An additional broadcast domain will be created.
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.
802.1Q and ISL

31. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Congestion avoidance - Windowing and Buffering
SMTP FTP and HTTP
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.
A cross-over cable

32. 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?
Encapsulations PPP and authentication CHAP
HTTPS - SMTP - and TFTP
Auto - On - and Desirable
Certkiller B > trace

33. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Show arp and Show interface
TCP
Increased latency and Filtering of all frame errors
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.

34. Which of the protocols below use TCP at the transport layer?
HTTPS - SMTP - and TFTP
The system is malfunctioning.
The Bridgeg ID and The bridge priority
SMTP - FTP - HTTP - and HTTPS

35. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Information about a route should never be sent back in the direction from which the original update came.
CertK Switch(config)# ip default-gateway 192.168.1.115
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
All switch and bridge ports are in either the forwarding or blocking state.

36. What are two characteristics of 'store and forward' switching?
Port security
The network layer
Network
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

37. 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?
A broadcast address will never be the source address of a frame
An electrical pulse indicates that the collision has cleared.
Network
To allow remote management of the switch.

38. 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?
Hosts use a logical bus topology
Certkiller B > trace
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.
Source Port - Acknowledgment Number - and Window

39. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
A cross-over cable
Auto - Desirable - and On
Hosts use a logical bus topology
The network layer

40. 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?
VLAN and Swtich
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
This is an Ethernet port operating at half duplex
Increased latency and Filtering of all frame errors

41. Which of the following can lead to the contribution of LAN traffic congestion?
SMTP FTP and HTTP
Packet switching - Packet filtering and Internetwork communication.
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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

42. 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
An additional broadcast domain will be created.
Show arp and Show interface
Packet switching - Packet filtering and Internetwork communication.
The system is malfunctioning.

43. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
Configure the switch so that it has a lower priority than other switches in the network.
Duplex mismatch
Auto - On - and Desirable

44. By default - which of the following factors determines the spanning-tree path cost?
Layer 3
It is the sum of the costs based on bandwidth
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Application

45. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
In an improperly implemented redundant topology
A broadcast address will never be the source address of a frame
MAC Address and Bridge Priority
All switch and bridge ports are in either the forwarding or blocking state.

46. 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
The network layer
Data link
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
An additional broadcast domain will be created.

47. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Packet switching - Packet filtering and Internetwork communication.
ARP and ICMP

48. 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?
A broadcast address will never be the source address of a frame
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
A hub and A repeater.

49. 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?
SMTP - FTP - HTTP - and HTTPS
Buffering - Cut-through - and Congestion avoidance
Congestion avoidance - Windowing and Buffering
STP

50. Which of the following are spanning tree port states?
MAC Address and Bridge Priority
ARP and ICMP
Learning - Listening - and Forwarding
100 meters