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. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Information about a route should never be sent back in the direction from which the original update came.
Transport
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

2. 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
Auto - Desirable - and On
Buffering - Cut-through - and Congestion avoidance
Data link
The port is experiencing errors

3. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Data link
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Information about a route should never be sent back in the direction from which the original update came.
Transport

4. Which of the following are spanning tree port states?
ARP and ICMP
The Bridgeg ID and The bridge priority
Learning - Listening - and Forwarding
In an improperly implemented redundant topology

5. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
STP
The system is malfunctioning.
Certkiller B > trace
Switches increase the number of collision domains in the network.

6. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
Auto - On - and Desirable
Network
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

7. 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?
Data link
Packet switching - Packet filtering and Internetwork communication.
Hosts use a logical bus topology
VTP

8. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
In an improperly implemented redundant topology
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

9. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
The Bridgeg ID and The bridge priority
STP
SMTP FTP and HTTP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

10. 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?
VTP
Switches increase the number of collision domains in the network.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
ARP and ICMP

11. By default - which of the following factors determines the spanning-tree path cost?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
It is the sum of the costs based on bandwidth
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 operates without collisions and It provides faster data transfer

12. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
In an improperly implemented redundant topology
Fiber optic cable.
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.
Duplex mismatch

13. Which OSI layer header contains the address of a destination host that is on another 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
SMTP - FTP - HTTP - and HTTPS
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Network

14. 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?
Configure the switch so that it has lower priority than other switches in the network
Packet switching - Packet filtering and Internetwork communication.
A hub and A repeater.
In an improperly implemented redundant topology

15. Which fields are included in the TCP header?
The network layer
Certkiller B > trace
Layer 3
Source Port - Acknowledgment Number - and Window

16. 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?
VLAN and Swtich
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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.
This is an Ethernet port operating at half duplex

17. Which of the following correctly describe steps in the OSI date encapsulation process?
SMTP FTP and HTTP
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.
Application
Path selections and Packet switching.

18. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Show arp and Show interface
This is an Ethernet port operating at half duplex
The switch will forward the frame to a specific port
Path selections and Packet switching.

19. 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?
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.
Certkiller B > trace
MAC Address and Bridge Priority

20. Which protocol uses TCP port 443 at layer 4?
Layer 4
Information about a route should never be sent back in the direction from which the original update came.
HTTPS
Packet switching - Packet filtering and Internetwork communication.

21. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
Layer 4
Sequence number - Window size - and Acknowledgment number
Fiber optic cable.

22. 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
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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Network

23. 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.)
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
SMTP FTP and HTTP
MAC Address and Bridge Priority
Encapsulations PPP and authentication CHAP

24. 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 increase the number of collision domains in the network.
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.
Switches - Bridges - and Routers
Telnet and FTP

25. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The switch will forward the frame to a specific port
Path selections and Packet switching.

26. 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
Buffering - Cut-through - and Congestion avoidance
The port is experiencing errors
Show arp and Show interface
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

27. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Increased latency and Filtering of all frame errors
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

28. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
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
Network
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

29. 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
SMTP FTP and HTTP
It operates without collisions and It provides faster data transfer
Fiber optic cable.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

30. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
The switch will forward the frame to a specific port
Encapsulations PPP and authentication CHAP
A cross-over cable
Serial0/1 is down - line protocol is down

31. 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?
Port security
VTP
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.

32. 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?
Data link
Serial0/1 is down - line protocol is down
Decrease the window size.
HTTPS - SMTP - and TFTP

33. With regard to Ethernet media access methods - which of the following are true?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
It operates without collisions and It provides faster data transfer
Encapsulations PPP and authentication CHAP
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.

34. Which of the following are types of flow control?
The interfaces must be configured for NAT.
Buffering - Cut-through - and Congestion avoidance
Increased latency and Filtering of all frame errors
100 meters

35. 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?
The interfaces must be configured for NAT.
Show cdp neighbor detail
Layer 4
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

36. 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
Path selections and Packet switching.
Source Port - Acknowledgment Number - and Window
A cross-over cable
The sequence number in the TCP header.

37. 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
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.
An electrical pulse indicates that the collision has cleared.
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.
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.

38. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
VTP
Auto - Desirable - and On
Device Identifiers - Capabilities list - Platform
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.

39. 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?
100 meters
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.
802.3ab and 802.3z
Congestion avoidance - Windowing and Buffering

40. 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?
Buffering - Cut-through - and Congestion avoidance
Congestion avoidance - Windowing and Buffering
To prevent switching loops in networks with redundant switched paths.
100 meters

41. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Network
VTP
Data link

42. 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?
An additional broadcast domain will be created.
The port is experiencing errors
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
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

43. 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?
Configure the switch so that it has lower priority than other switches in the network
Increased latency and Filtering of all frame errors
To allow remote management of the switch.
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

44. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Configure the switch so that it has a lower priority than other switches in the network.

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

46. 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
SMTP FTP and HTTP
Path selections and Packet switching.
Network

47. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Hosts use a logical bus topology
Switches - Bridges - and Routers
It is used to prevent switching loops in networks with redundant switched routes.
Configure the switch so that it has lower priority than other switches in the network

48. 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?
To allow remote management of the switch.
Network
Port security
VLAN and Swtich

49. 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?
An additional broadcast domain will be created.
It will prevent segment 1's broadcasts from getting to segment 2.
A broadcast address will never be the source address of a frame
Application

50. 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?
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.
Transport
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The Bridgeg ID and The bridge priority