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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. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
Layer 4
100 meters
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

2. 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?
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
SMTP - FTP - HTTP - and HTTPS
The switch will forward the frame to a specific port
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

3. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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
Switches - Bridges - and Routers
Encapsulations PPP and authentication CHAP

4. Why is full-duplex Ethernet superior to its single-duplex counterpart?
A broadcast address will never be the source address of a frame
It operates without collisions and It provides faster data transfer
Switches increase the number of collision domains in the network.
Application

5. 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 interfaces must be configured for NAT.
Layer 4
Transport
The network layer

6. 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
VLAN and Swtich
Data link
Hosts use a logical bus topology

7. 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?
This is an Ethernet port operating at half duplex
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.
802.1Q and ISL
The network layer

8. 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.
TCP
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

9. 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
Fiber optic cable.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
Switches increase the number of collision domains in the network.

10. 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
VTP will allow switches to share VLAN configuration information
STP
Auto - On - and Desirable

11. 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
Certkiller B > trace
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
Show arp and Show interface

12. With regard to Ethernet media access methods - which of the following are true?
Layer 4
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.
Learning - Listening - and Forwarding
Auto - On - and Desirable

13. 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?
Data link
All switch and bridge ports are in either the forwarding or blocking state.
Configure the switch so that it has lower priority than other switches in the network
Switches increase the number of collision domains in the network.

14. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
An electrical pulse indicates that the collision has cleared.
802.1Q and ISL
Learning - Listening - and Forwarding
HTTPS - SMTP - and TFTP

15. 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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Full-duplex Ethernet can provide higher throughput 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.
Physical Layer and Datalink Layer

16. 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?
A hub and A repeater.
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
Learning - Listening - and Forwarding
Switches - Bridges - and Routers

17. Which protocol uses TCP port 443 at layer 4?
Network
HTTPS
Sequence number - Window size - and Acknowledgment number
Fiber optic cable.

18. 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 CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Switches - Bridges - and Routers
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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

19. 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?
Duplex mismatch
Switches increase the number of collision domains in the network.
Show cdp neighbor detail
Certkiller B > trace

20. 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?
The Bridgeg ID and The bridge priority
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.
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

21. 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?
Decrease the window size.
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
Duplex mismatch

22. 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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
STP
Show cdp neighbor detail

23. Which OSI layer header contains the address of a destination host that is on another network?
Learning - Listening - and Forwarding
Network
Show cdp neighbor detail
Fiber optic cable.

24. By default - which of the following factors determines the spanning-tree path cost?
Transport
The system is malfunctioning.
It is the sum of the costs based on bandwidth
Configure the switch so that it has a lower priority than other switches in the network.

25. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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.
Layer 4
Path selections and Packet switching.

26. 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
The sequence number in the TCP header.
ARP and ICMP
The network layer

27. In a switched LAN network - What is the Spanning-Tree algorithm used for?
VTP will allow switches to share VLAN configuration information
It is used to prevent switching loops in networks with redundant switched routes.
Device Identifiers - Capabilities list - Platform
Port security

28. 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
802.3ab and 802.3z
Learning - Listening - and Forwarding
Path selections and Packet switching.

29. 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
Show arp and Show interface
Physical Layer and Datalink Layer
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.
Application

30. 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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Switches increase the number of collision domains in the network.
The sequence number in the TCP header.

31. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
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.
Transport
The system is malfunctioning.
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

32. 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
Switches - Bridges - and Routers
To allow remote management of the switch.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

33. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Auto - Desirable - and On
Device Identifiers - Capabilities list - Platform
It is the sum of the costs based on bandwidth
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.

34. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
To allow remote management of the switch.
Switches - Bridges - and Routers

35. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Network
The switch will forward the frame to a specific port
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
In an improperly implemented redundant topology

36. 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 is used to prevent switching loops in networks with redundant switched routes.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Decrease the window size.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

37. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
The network layer
Information about a route should never be sent back in the direction from which the original update came.
Network
VLAN and Swtich

38. Which fields are included in the TCP header?
Path selections and Packet switching.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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

39. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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.
Data link
Packet switching - Packet filtering and Internetwork communication.

40. Which of the following are true of Ethernet technology?
Switches increase the number of collision domains in the network.
Buffering - Cut-through - and Congestion avoidance
Hosts use a logical bus topology
Increased latency and Filtering of all frame errors

41. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Telnet and FTP
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.
It is used to prevent switching loops in networks with redundant switched routes.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

42. Which of the following services use TCP?
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
MAC Address and Bridge Priority
SMTP FTP and HTTP
Application

43. 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?
Sequence number - Window size - and Acknowledgment number
SMTP FTP and HTTP
Hosts use a logical bus topology
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

44. 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
The sequence number in the TCP header.
Physical Layer and Datalink Layer
Packet switching - Packet filtering and Internetwork communication.

45. 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
Data link
Serial0/1 is down - line protocol is down
Decrease the window size.

46. Which two of the following values does STP take into consideration when it elects the root bridge?
Certkiller B > trace
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The Bridgeg ID and The bridge priority
An electrical pulse indicates that the collision has cleared.

47. 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
The sequence number in the TCP header.
Serial0/1 is down - line protocol is down
MAC Address and Bridge Priority
Application

48. 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 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
Duplex mismatch
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

49. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
STP
Network
VTP

50. 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?
Device Identifiers - Capabilities list - Platform
A hub and A repeater.
Buffering - Cut-through - and Congestion avoidance
Hosts use a logical bus topology