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 line from the output of the show ip interface command indicates that there is a Layer 1 problem?
It will prevent segment 1's broadcasts from getting to segment 2.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Serial0/1 is down - line protocol is down
Port security

2. 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?
Decrease the window size.
VLAN and Swtich
This is an Ethernet port operating at half duplex
To allow remote management of the switch.

3. What are two characteristics of 'store and forward' switching?
Switches increase the number of collision domains in the network.
Physical Layer and Datalink Layer
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

4. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Switches increase the number of collision domains in the network.
Increased latency and Filtering of all frame errors

5. 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
Information about a route should never be sent back in the direction from which the original update came.
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
To allow remote management of the switch.
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.

6. 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?
Network
Certkiller B > trace
Layer 3
VTP will allow switches to share VLAN configuration information

7. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Auto - On - and Desirable

8. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Application
802.1Q and ISL
Switches - Bridges - and Routers
It operates without collisions and It provides faster data transfer

9. Which OSI layer header contains the address of a destination host that is on another network?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Show arp and Show interface
Network
802.1Q and ISL

10. 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?

11. 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?
Auto - On - and Desirable
It is the sum of the costs based on bandwidth
802.1Q and ISL
100 meters

12. 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?
Auto - Desirable - and On
Show arp and Show interface
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 hub and A repeater.

13. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Auto - On - and Desirable
Learning - Listening - and Forwarding
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

14. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Device Identifiers - Capabilities list - Platform
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 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.
A cross-over cable

15. Which protocol uses TCP port 443 at layer 4?
HTTPS
The network layer
The port is experiencing errors
It will prevent segment 1's broadcasts from getting to segment 2.

16. 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?
Switches increase the number of collision domains in 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.
VTP
Sequence number - Window size - and Acknowledgment number

17. What is the purpose of the spanning-tree algorithm in a switched LAN?
Source Port - Acknowledgment Number - and Window
Duplex mismatch
It is the sum of the costs based on bandwidth
To prevent switching loops in networks with redundant switched paths.

18. 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
Switches increase the number of collision domains in the network.
The sequence number in the TCP header.
The Bridgeg ID and The bridge priority
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.

19. Which of the following services use TCP?
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.
SMTP FTP and HTTP
To allow remote management of the switch.
The switch will forward the frame to a specific port

20. 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?
Show cdp neighbor detail
The interfaces must be configured for NAT.
An additional broadcast domain will be created.
Configure the switch so that it has a lower priority than other switches in the network.

21. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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.
ARP and ICMP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

22. 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?
Learning - Listening - and Forwarding
Information about a route should never be sent back in the direction from which the original update came.
An electrical pulse indicates that the collision has cleared.
Layer 3

23. In a switched LAN network - What is the Spanning-Tree algorithm used for?
The network layer
It is used to prevent switching loops in networks with redundant switched routes.
Show cdp neighbor detail
Switches increase the number of collision domains in the network.

24. 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.
STP
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.
Configure the switch so that it has lower priority than other switches in the network

25. What is the IEEE standard associated with Gigabit Ethernet?
To allow remote management of the switch.
It will prevent segment 1's broadcasts from getting to segment 2.
802.3ab and 802.3z
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.

26. 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.
Data link
Application
A broadcast address will never be the source address of a frame
Port security

27. Which of the following can lead to the contribution of LAN traffic congestion?
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.
Transport
It is used to prevent switching loops in networks with redundant switched routes.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

28. 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.
Learning - Listening - and Forwarding
The system is malfunctioning.
VLAN and Swtich

29. 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?
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
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

30. 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?
Telnet and FTP
VTP will allow switches to share VLAN configuration information
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Switches increase the number of collision domains in the network.

31. 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 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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

32. 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?
The network layer
Network
To allow remote management of the switch.
An additional broadcast domain will be created.

33. 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?
802.3ab and 802.3z
The port is experiencing errors
VLAN and Swtich
This is an Ethernet port operating at half duplex

34. 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)
All switch and bridge ports are in either the forwarding or blocking state.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Device Identifiers - Capabilities list - Platform
Data link

35. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a 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.
Application
SMTP - FTP - HTTP - and HTTPS
Layer 4

36. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Transport
Path selections and Packet switching.
Network
Certkiller B > trace

37. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
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.
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

38. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Buffering - Cut-through - and Congestion avoidance
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
To prevent switching loops in networks with redundant switched paths.
MAC Address and Bridge Priority

39. Which three of the protocols below belong to the application layer? (Select three answer choices)
The system is malfunctioning.
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.
HTTPS - SMTP - and TFTP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

40. 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?
Show cdp neighbor detail
Information about a route should never be sent back in the direction from which the original update came.
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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

41. 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?
Switches increase the number of collision domains in the network.
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.
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
STP

42. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
The system is malfunctioning.
It is the sum of the costs based on bandwidth
It operates without collisions and It provides faster data transfer
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

43. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
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.
Auto - Desirable - and On
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
ARP and ICMP

44. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
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.
It is the sum of the costs based on bandwidth
100 meters

45. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
MAC Address and Bridge Priority
To allow remote management of the switch.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Certkiller B > trace

46. 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.
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.
Layer 3

47. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Configure the switch so that it has a lower priority than other switches in the network.
VTP will allow switches to share VLAN configuration information
Transport
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.

48. 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
Auto - On - and Desirable
VLAN and Swtich
A cross-over cable
It operates without collisions and It provides faster data transfer

49. Which of the following correctly describe steps in the OSI date encapsulation process?
Network
The switch will forward the frame to a specific port
Duplex mismatch
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.

50. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Layer 3
To prevent switching loops in networks with redundant switched paths.
STP