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. CDP is running between two CK devices. What information is supplied by CDP?
Layer 4
The Bridgeg ID and The bridge priority
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.
Device Identifiers - Capabilities list - Platform

2. 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 Bridgeg ID and The bridge priority
The sequence number in the TCP header.
HTTPS - SMTP - and TFTP
Transport

3. You are logged into a router and wish to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?
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.
Show cdp neighbor detail
VTP
Switches increase the number of collision domains in the network.

4. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
Path selections and Packet switching.
Packet switching - Packet filtering and Internetwork communication.
The interfaces must be configured for NAT.

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?
All switch and bridge ports are in either the forwarding or blocking state.
ARP and ICMP
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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

6. Which two of the following values does STP take into consideration when it elects the root bridge?
The system is malfunctioning.
The Bridgeg ID and The bridge priority
Transport
Switches increase the number of collision domains in the network.

7. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
SMTP FTP and HTTP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Information about a route should never be sent back in the direction from which the original update came.

8. Which OSI layer header contains the address of a destination host that is on another network?
Network
VTP
Data link
The port is experiencing errors

9. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Layer 4
Telnet and FTP
Auto - Desirable - and On

10. 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
ARP and ICMP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Serial0/1 is down - line protocol is down

11. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Network
The interfaces must be configured for NAT.

12. Which protocol uses TCP port 443 at layer 4?
The Bridgeg ID and The bridge priority
Increased latency and Filtering of all frame errors
SMTP FTP and HTTP
HTTPS

13. 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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Certkiller B > trace

14. 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?
Encapsulations PPP and authentication CHAP
Certkiller B > trace
The Bridgeg ID and The bridge priority
Layer 3

15. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Certkiller B > trace
SMTP FTP and HTTP
Data link
The interfaces must be configured for NAT.

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?
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
Certkiller B > trace
In an improperly implemented redundant topology
This is an Ethernet port operating at half duplex

17. 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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Hosts use a logical bus topology

18. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
It is the sum of the costs based on bandwidth
Physical Layer and Datalink Layer
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.

19. 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
Learning - Listening - and Forwarding
Configure the switch so that it has a lower priority than other switches in the network.
Port security

20. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
The port is experiencing errors
Switches increase the number of collision domains in the network.
Layer 4
Fiber optic cable.

21. 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?
Port security
Switches - Bridges - and Routers
This is an Ethernet port operating at half duplex
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

22. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It is used to prevent switching loops in networks with redundant switched routes.
Hosts use a logical bus topology
Congestion avoidance - Windowing and Buffering
ARP and ICMP

23. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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
Physical Layer and Datalink Layer
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Switches - Bridges - and Routers

24. 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?
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.
CertK Switch(config)# ip default-gateway 192.168.1.115
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

25. 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?
Show cdp neighbor detail
The system is malfunctioning.
Decrease the window size.
Sequence number - Window size - and Acknowledgment number

26. 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?
The network layer
Congestion avoidance - Windowing and Buffering
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Certkiller B > trace

27. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Data link
A cross-over cable
SMTP FTP and HTTP
Switches increase the number of collision domains in the network.

28. 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)
Application
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
CertK Switch(config)# ip default-gateway 192.168.1.115
Hosts use a logical bus topology

29. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
Increased latency and Filtering of all frame errors
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
In an improperly implemented redundant topology

30. 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
To prevent switching loops in networks with redundant switched paths.
Source Port - Acknowledgment Number - and Window
Buffering - Cut-through - and Congestion avoidance

31. 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?
Fiber optic cable.
Data link
The network layer
802.3ab and 802.3z

32. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Data link
Packet switching - Packet filtering and Internetwork communication.
STP

33. 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
The system is malfunctioning.
Layer 3
Duplex mismatch
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 three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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.
Show cdp neighbor detail
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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

35. Which of the following are spanning tree port states?
Switches - Bridges - and Routers
Learning - Listening - and Forwarding
Application
To allow remote management of the switch.

36. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
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
Serial0/1 is down - line protocol is down

37. 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?
Layer 4
Show cdp neighbor detail
A broadcast address will never be the source address of a frame
ARP and ICMP

38. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
In an improperly implemented redundant topology
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.
Congestion avoidance - Windowing and Buffering

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?
The network layer
All switch and bridge ports are in either the forwarding or blocking state.
Transport
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.

40. 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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Data link
The network layer
Information about a route should never be sent back in the direction from which the original update came.

41. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
It is used to prevent switching loops in networks with redundant switched routes.
VTP
Encapsulations PPP and authentication CHAP
The system is malfunctioning.

42. 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?
STP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
VTP
Sequence number - Window size - and Acknowledgment number

43. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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

44. 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
A cross-over cable
Fiber optic cable.
It will prevent segment 1's broadcasts from getting to segment 2.

45. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Application
All switch and bridge ports are in either the forwarding or blocking state.
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 receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

46. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The switch will forward the frame to a specific port
Transport
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.

47. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

48. 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
Telnet and FTP
Fiber optic cable.
Information about a route should never be sent back in the direction from which the original update came.
It will prevent segment 1's broadcasts from getting to segment 2.

49. Which of the following are true of Ethernet technology?
VTP
Hosts use a logical bus topology
Application
The network layer

50. 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?
VTP
A cross-over cable
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.