Test your basic knowledge |

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. 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?
Encapsulations PPP and authentication CHAP
An electrical pulse indicates that the collision has cleared.
Configure the switch so that it has lower priority than other switches in the network
802.3ab and 802.3z

2. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
To prevent switching loops in networks with redundant switched paths.
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

3. 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)
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 switch will forward the frame to a specific port
It is used to prevent switching loops in networks with redundant switched routes.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

4. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Layer 3
It operates without collisions and It provides faster data transfer
802.1Q and ISL

5. 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?
The sequence number in the TCP header.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A broadcast address will never be the source address of a frame
Telnet and FTP

6. 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.
Buffering - Cut-through - and Congestion avoidance
Auto - On - and Desirable
The system is malfunctioning.

7. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of 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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
It is the sum of the costs based on bandwidth
Transport

8. 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?
Information about a route should never be sent back in the direction from which the original update came.
802.1Q and ISL
Port security
Configure the switch so that it has lower priority than other switches in the network

9. Which fields are included in the TCP header?
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.
Application
Increased latency and Filtering of all frame errors
Source Port - Acknowledgment Number - and Window

10. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free 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
Duplex mismatch
STP
Source Port - Acknowledgment Number - and Window

11. 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.)
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.
MAC Address and Bridge Priority
100 meters
Physical Layer and Datalink Layer

12. What is the IEEE standard associated with Gigabit Ethernet?
Buffering - Cut-through - and Congestion avoidance
The sequence number in the TCP header.
802.3ab and 802.3z
Layer 3

13. Which OSI layer header contains the address of a destination host that is on another network?
Encapsulations PPP and authentication CHAP
A hub and A repeater.
The switch will forward the frame to a specific port
Network

14. As a Certkiller trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
Data link
ARP and ICMP
Hosts use a logical bus topology
CertK Switch(config)# ip default-gateway 192.168.1.115

15. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
ARP and ICMP
Information about a route should never be sent back in the direction from which the original update came.
Buffering - Cut-through - and Congestion avoidance
Switches increase the number of collision domains in the network.

16. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
In an improperly implemented redundant topology
Data link
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Layer 4

17. Which of the following services use TCP?
SMTP FTP and HTTP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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

18. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
SMTP - FTP - HTTP - and HTTPS
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Data link
Data link

19. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
VTP will allow switches to share VLAN configuration information
Port security
TCP
To allow remote management of the switch.

20. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Path selections and Packet switching.
A broadcast address will never be the source address of a frame
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

21. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Information about a route should never be sent back in the direction from which the original update came.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The interfaces must be configured for NAT.

22. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VTP will allow switches to share VLAN configuration information
HTTPS - SMTP - and TFTP
802.1Q and ISL

23. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
VLAN and Swtich
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

24. In a switched LAN network - What is the Spanning-Tree algorithm used for?
ARP and ICMP
It is used to prevent switching loops in networks with redundant switched routes.
It will prevent segment 1's broadcasts from getting to segment 2.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

25. 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.
Switches - Bridges - and Routers
Serial0/1 is down - line protocol is down
Telnet and FTP

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?
The system is malfunctioning.
Buffering - Cut-through - and Congestion avoidance
Layer 3
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. 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.
Show arp and Show interface
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.
The port is experiencing errors

28. Which of the following are spanning tree port states?
The Bridgeg ID and The bridge priority
Learning - Listening - and Forwarding
Source Port - Acknowledgment Number - and Window
This is an Ethernet port operating at half duplex

29. 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.
Application
Switches - Bridges - and Routers
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

30. 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?
Increased latency and Filtering of all frame errors
Application
Information about a route should never be sent back in the direction from which the original update came.
In an improperly implemented redundant topology

31. 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
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
Serial0/1 is down - line protocol is down
The network layer
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

32. Which of the following are types of flow control?
To prevent switching loops in networks with redundant switched paths.
Buffering - Cut-through - and Congestion avoidance
This is an Ethernet port operating at half duplex
Increased latency and Filtering of all frame errors

33. What are two characteristics of 'store and forward' switching?
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.
Configure the switch so that it has a lower priority than other switches in the network.
Application
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

34. 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.
Layer 3
Show arp and Show interface
Application
100 meters

35. With regard to Ethernet media access methods - which of the following are true?
Network
It operates without collisions and It provides faster data transfer
Switches increase the number of collision domains in the network.
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.

36. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Buffering - Cut-through - and Congestion avoidance
Show arp and Show interface

37. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
The port is experiencing errors
Network
Application
Serial0/1 is down - line protocol is down

38. 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
Port security
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.
HTTPS
Auto - Desirable - and On

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

40. 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?
VTP
Data link
SMTP FTP and HTTP
To allow remote management of the switch.

41. 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
Device Identifiers - Capabilities list - Platform
The switch will forward the frame to a specific port
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The sequence number in the TCP header.

42. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
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.
Layer 4
Device Identifiers - Capabilities list - Platform

43. 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?
HTTPS
The network layer
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

44. 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
Certkiller B > trace
Physical Layer and Datalink Layer

45. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Certkiller B > trace
VTP will allow switches to share VLAN configuration information
Serial0/1 is down - line protocol is down
Network

46. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Buffering - Cut-through - and Congestion avoidance
Increased latency and Filtering of all frame errors
VTP will allow switches to share VLAN configuration information
Serial0/1 is down - line protocol is down

47. 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?
TCP
SMTP FTP and HTTP
Physical Layer and Datalink Layer
It will prevent segment 1's broadcasts from getting to segment 2.

48. 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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The system is malfunctioning.
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

49. 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?
Show arp and Show interface
Switches increase the number of collision domains in the network.
ARP and ICMP
SMTP FTP and HTTP

50. Which of the following devices can the Certkiller network administrator use to segment the LAN?
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Switches - Bridges - and Routers
Switches increase the number of collision domains in the network.