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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?
Show arp and Show interface
TCP
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 cross-over cable

2. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
SMTP - FTP - HTTP - and HTTPS
Encapsulations PPP and authentication CHAP
Information about a route should never be sent back in the direction from which the original update came.
Decrease the window size.

3. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Congestion avoidance - Windowing and Buffering
Application
The sequence number in the TCP header.

4. Which of the following are spanning tree port states?
Data link
Device Identifiers - Capabilities list - Platform
Learning - Listening - and Forwarding
SMTP FTP and HTTP

5. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

6. Which OSI layer header contains the address of a destination host that is on another network?
Path selections and Packet switching.
Certkiller B > trace
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. 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?
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.
Packet switching - Packet filtering and Internetwork communication.
The network layer
Port security

8. 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?
Show arp and Show interface
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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Increased latency and Filtering of all frame errors

9. 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?
An electrical pulse indicates that the collision has cleared.
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.
Port security
Device Identifiers - Capabilities list - Platform

10. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
It will prevent segment 1's broadcasts from getting to segment 2.
Device Identifiers - Capabilities list - Platform
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Duplex mismatch

11. 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?
Decrease the window size.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.
Hosts use a logical bus topology

12. 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?
A cross-over cable
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Telnet and FTP
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.

13. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
VTP
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.
TCP
802.1Q and ISL

14. 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
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.
The network layer
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.

15. 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
The port is experiencing errors
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 is the sum of the costs based on bandwidth

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?
SMTP FTP and HTTP
VTP will allow switches to share VLAN configuration information
Path selections and Packet switching.
VTP

17. 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.
Serial0/1 is down - line protocol is down
Buffering - Cut-through - and Congestion avoidance
It operates without collisions and It provides faster data transfer

18. 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
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
Configure the switch so that it has lower priority than other switches in the network
A hub and A repeater.

19. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Switches - Bridges - and Routers
It is used to prevent switching loops in networks with redundant switched routes.
Configure the switch so that it has a lower priority than other switches in the network.
A cross-over cable

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

21. With regard to Ethernet media access methods - which of the following are true?
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.
HTTPS - SMTP - and TFTP
Data link
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.

22. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
A hub and A repeater.
STP
Auto - Desirable - and On
Layer 3

23. 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?
The port is experiencing errors
Sequence number - Window size - and Acknowledgment number
Network
Network

24. CDP is running between two CK devices. What information is supplied by CDP?
Application
Congestion avoidance - Windowing and Buffering
Device Identifiers - Capabilities list - Platform
HTTPS - SMTP - and TFTP

25. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Layer 3
SMTP FTP and HTTP
Packet switching - Packet filtering and Internetwork communication.
VTP will allow switches to share VLAN configuration information

26. 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?
Serial0/1 is down - line protocol is down
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Layer 4
TCP

27. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
TCP
Congestion avoidance - Windowing and Buffering
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

28. 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?
The interfaces must be configured for NAT.
CertK Switch(config)# ip default-gateway 192.168.1.115
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 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.

29. 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?
Switches increase the number of collision domains in the network.
Increased latency and Filtering of all frame errors
Certkiller B > trace
Fiber optic cable.

30. 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
MAC Address and Bridge Priority
To allow remote management of the switch.
Fiber optic cable.
The network layer

31. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Physical Layer and Datalink Layer
Configure the switch so that it has lower priority than other switches in the network
VTP will allow switches to share VLAN configuration information

32. 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?
Switches increase the number of collision domains in the network.
Show cdp neighbor detail
The port is experiencing errors
Hosts use a logical bus topology

33. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Port security
Serial0/1 is down - line protocol is down
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.
SMTP FTP and HTTP

34. 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
STP
Switches increase the number of collision domains in the network.
Data link

35. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The interfaces must be configured for NAT.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

36. 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?
Learning - Listening - and Forwarding
To allow remote management of the switch.
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

37. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Application
The network layer
It is the sum of the costs based on bandwidth

38. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Sequence number - Window size - and Acknowledgment number
Encapsulations PPP and authentication CHAP
802.1Q and ISL
HTTPS

39. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
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.
ARP and ICMP

40. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The sequence number in the TCP header.
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
The port is experiencing errors

41. Which fields are included in the TCP header?
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.
Source Port - Acknowledgment Number - and Window
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Switches - Bridges - and Routers

42. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Packet switching - Packet filtering and Internetwork communication.
Network
In an improperly implemented redundant topology

43. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Duplex mismatch
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.

44. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Show arp and Show interface
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 hub and A repeater.

45. 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?
Congestion avoidance - Windowing and Buffering
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Layer 4
The system is malfunctioning.

46. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Data link
Buffering - Cut-through - and Congestion avoidance
Path selections and Packet switching.
Configure the switch so that it has lower priority than other switches in the network

47. 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?
HTTPS - SMTP - and TFTP
Switches increase the number of collision domains in the network.
ARP and ICMP
Buffering - Cut-through - and Congestion avoidance

48. 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?
Show arp and Show interface
Configure the switch so that it has a lower priority than other switches in the network.
CertK Switch(config)# ip default-gateway 192.168.1.115
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

49. 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?
MAC Address and Bridge Priority
Show arp and Show interface
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
It is used to prevent switching loops in networks with redundant switched routes.

50. 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?
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.
This is an Ethernet port operating at half duplex
To prevent switching loops in networks with redundant switched paths.
The sequence number in the TCP header.

Can you answer 50 questions in 15 minutes?

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