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 two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller 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
Encapsulations PPP and authentication CHAP
Layer 4
HTTPS

2. 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?
The port is experiencing errors
Show cdp neighbor detail
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 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.

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

4. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Application
It operates without collisions and It provides faster data transfer
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
STP

5. 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
802.1Q and ISL
VLAN and Swtich
Auto - Desirable - and On
The sequence number in the TCP header.

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?
Certkiller B > trace
802.3ab and 802.3z
VTP
HTTPS - SMTP - and TFTP

7. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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
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.

8. 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.
100 meters
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

9. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
The interfaces must be configured for NAT.
Transport
CertK Switch(config)# ip default-gateway 192.168.1.115
Switches increase the number of collision domains in the network.

10. 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.
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.
Device Identifiers - Capabilities list - Platform
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

11. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
In an improperly implemented redundant topology
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
Auto - Desirable - and On

12. 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?
Show arp and Show interface
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.
Sequence number - Window size - and Acknowledgment number
The port is experiencing errors

13. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
In an improperly implemented redundant topology
An additional broadcast domain will be created.
STP
To allow remote management of the switch.

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?
Layer 3
SMTP FTP and HTTP
VTP will allow switches to share VLAN configuration information
Serial0/1 is down - line protocol is down

15. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
Data link
SMTP FTP and HTTP
The network layer

16. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Switches increase the number of collision domains in the network.
TCP
Port security
Configure the switch so that it has a lower priority than other switches in the network.

17. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
MAC Address and Bridge Priority
It is used to prevent switching loops in networks with redundant switched routes.

18. 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?
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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
An additional broadcast domain will be created.
Switches - Bridges - and Routers

19. 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?
100 meters
VTP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Duplex mismatch

20. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Switches increase the number of collision domains in the network.
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.
To prevent switching loops in networks with redundant switched paths.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

21. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Encapsulations PPP and authentication CHAP
Congestion avoidance - Windowing and Buffering
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 network layer

22. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Packet switching - Packet filtering and Internetwork communication.
A hub and A repeater.
Congestion avoidance - Windowing and Buffering
Network

23. 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?
Path selections and Packet switching.
Encapsulations PPP and authentication CHAP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The interfaces must be configured for NAT.

24. 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?
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
Packet switching - Packet filtering and Internetwork communication.
Data link

25. 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?
VTP will allow switches to share VLAN configuration information
The port is experiencing errors
Increased latency and Filtering of all frame errors
The network layer

26. By default - which of the following factors determines the spanning-tree path cost?
Physical Layer and Datalink Layer
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.
Layer 3

27. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
TCP
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

28. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Information about a route should never be sent back in the direction from which the original update came.
Encapsulations PPP and authentication CHAP
Buffering - Cut-through - and Congestion avoidance
SMTP - FTP - HTTP - and HTTPS

29. 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 Bridgeg ID and The bridge priority
It operates without collisions and It provides faster data transfer
MAC Address and Bridge Priority
Information about a route should never be sent back in the direction from which the original update came.

30. Which of the following are spanning tree port states?
Application
802.1Q and ISL
Encapsulations PPP and authentication CHAP
Learning - Listening - and Forwarding

31. 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
Duplex mismatch
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.
Network

32. 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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Sequence number - Window size - and Acknowledgment number
VLAN and Swtich
Telnet and FTP

33. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The port is experiencing errors
The system is malfunctioning.
Layer 4
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

34. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller 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.
VTP
To prevent switching loops in networks with redundant switched paths.
Network

35. 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?
TCP
CertK Switch(config)# ip default-gateway 192.168.1.115
The system is malfunctioning.
Configure the switch so that it has a lower priority than other switches in the network.

36. 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?
802.1Q and ISL
It is used to prevent switching loops in networks with redundant switched routes.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Learning - Listening - and Forwarding

37. Which of the protocols below use TCP at the transport layer?
Certkiller B > trace
Hosts use a logical bus topology
Data link
SMTP - FTP - HTTP - and HTTPS

38. What is the IEEE standard associated with Gigabit Ethernet?
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
802.3ab and 802.3z
802.1Q and ISL

39. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
SMTP - FTP - HTTP - and HTTPS
To prevent switching loops in networks with redundant switched paths.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

40. 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.
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

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?
Physical Layer and Datalink Layer
Learning - Listening - and Forwarding
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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.

42. What are two characteristics of 'store and forward' switching?
Telnet and FTP
HTTPS
MAC Address and Bridge Priority
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

43. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
All switch and bridge ports are in either the forwarding or blocking state.
Serial0/1 is down - line protocol is down
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Device Identifiers - Capabilities list - Platform

44. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The system is malfunctioning.
Serial0/1 is down - line protocol is down
Decrease the window size.

45. 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
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.
Layer 4
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

46. 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
Switches increase the number of collision domains in the network.
Layer 4
Show arp and Show interface
A cross-over cable

47. Which three of the protocols below belong to the application layer? (Select three answer choices)
Switches increase the number of collision domains in the network.
HTTPS - SMTP - and TFTP
VTP will allow switches to share VLAN configuration information
VTP

48. 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
VTP will allow switches to share VLAN configuration information
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The switch will forward the frame to a specific port
Switches increase the number of collision domains in the network.

49. 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 network layer
ARP and ICMP
In an improperly implemented redundant topology
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.

50. 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
All switch and bridge ports are in either the forwarding or blocking state.
Serial0/1 is down - line protocol is down
ARP and ICMP
The network layer