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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. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
The Bridgeg ID and The bridge priority
The port is experiencing errors
Switches increase the number of collision domains in the network.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

2. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
Duplex mismatch
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Switches - Bridges - and Routers

3. 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 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.
Congestion avoidance - Windowing and Buffering
The network layer
It is used to prevent switching loops in networks with redundant switched routes.

4. 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
802.3ab and 802.3z
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Duplex mismatch
The switch will forward the frame to a specific port

5. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
Data link
Encapsulations PPP and authentication CHAP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

6. 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.
Fiber optic cable.
100 meters
Switches increase the number of collision domains in the network.

7. 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
To allow remote management of the switch.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Serial0/1 is down - line protocol is down
The network layer

8. 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?
Certkiller B > trace
The switch will forward the frame to a specific port
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The interfaces must be configured for NAT.

9. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operations?
Application
To prevent switching loops in networks with redundant switched paths.
100 meters
Layer 4

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
To prevent switching loops in networks with redundant switched paths.
Show arp and Show interface
Serial0/1 is down - line protocol is down
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

11. 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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
It operates without collisions and It provides faster data transfer
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.
An additional broadcast domain will be created.

12. 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
Switches increase the number of collision domains in the network.
HTTPS - SMTP - and TFTP
VLAN and Swtich
Fiber optic cable.

13. 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
ARP and ICMP
802.1Q and ISL
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

14. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
VLAN and Swtich
Duplex mismatch
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. 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?
The switch will forward the frame to a specific port
Switches increase the number of collision domains in the network.
It operates without collisions and It provides faster data transfer
An electrical pulse indicates that the collision has cleared.

16. What is the purpose of the spanning-tree algorithm in a switched LAN?
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.
MAC Address and Bridge Priority
It operates without collisions and It provides faster data transfer

17. 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?
Path selections and Packet switching.
Encapsulations PPP and authentication CHAP
This is an Ethernet port operating at half duplex
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.

18. 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
Congestion avoidance - Windowing and Buffering
To prevent switching loops in networks with redundant switched paths.
VTP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

19. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Decrease the window size.
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.
Layer 4

20. 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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Buffering - Cut-through - and Congestion avoidance
ARP and ICMP

21. 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?
Auto - Desirable - and On
VTP will allow switches to share VLAN configuration information
To allow remote management of the switch.
The Bridgeg ID and The bridge priority

22. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Auto - Desirable - and On
Path selections and Packet switching.
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.

23. Which of the following services use TCP?
Switches increase the number of collision domains in the network.
Transport
SMTP FTP and HTTP
It is used to prevent switching loops in networks with redundant switched routes.

24. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Layer 3
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.

25. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
The system is malfunctioning.
Hosts use a logical bus topology
Data link
Layer 4

26. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Configure the switch so that it has a lower priority than other switches in the network.
Layer 4
Switches - Bridges - and Routers
Certkiller B > trace

27. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
SMTP FTP and HTTP
An additional broadcast domain will be created.
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 will allow switches to share VLAN configuration information

28. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Encapsulations PPP and authentication CHAP
802.1Q and ISL
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.
Path selections and Packet switching.

29. 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?
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.
VTP will allow switches to share VLAN configuration information
Source Port - Acknowledgment Number - and Window
ARP and ICMP

30. By default - which of the following factors determines the spanning-tree path cost?
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.
100 meters
It is the sum of the costs based on bandwidth

31. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
The network layer
Show arp and Show interface
TCP
In an improperly implemented redundant topology

32. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Network
Source Port - Acknowledgment Number - and Window
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
ARP and ICMP

33. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
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.
Data link
Serial0/1 is down - line protocol is down
Layer 4

34. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Switches - Bridges - and Routers
Auto - Desirable - and On
The port is experiencing errors

35. 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?
Learning - Listening - and Forwarding
Auto - On - and Desirable
The port is experiencing errors
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

36. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Configure the switch so that it has lower priority than other switches in the network
Path selections and Packet switching.
All switch and bridge ports are in either the forwarding or blocking state.

37. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Switches increase the number of collision domains in the network.
802.1Q and ISL
It operates without collisions and It provides faster data transfer
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.

38. 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
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 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. 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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
TCP
802.3ab and 802.3z

40. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
An electrical pulse indicates that the collision has cleared.
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.
Switches increase the number of collision domains in the network.

41. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
100 meters
Switches increase the number of collision domains in the network.
All switch and bridge ports are in either the forwarding or blocking state.

42. 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?
100 meters
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.
Packet switching - Packet filtering and Internetwork communication.
The network layer

43. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
MAC Address and Bridge Priority
VTP
STP
Application

44. 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.)
Switches increase the number of collision domains in the network.
MAC Address and Bridge Priority
Device Identifiers - Capabilities list - Platform
802.1Q and ISL

45. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Layer 4
To prevent switching loops in networks with redundant switched paths.
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.
A broadcast address will never be the source address of a frame

46. 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?

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47. 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.
Application
Application
Learning - Listening - and Forwarding

48. 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?
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.
Physical Layer and Datalink Layer
Auto - On - and Desirable

49. 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.
Information about a route should never be sent back in the direction from which the original update came.
Sequence number - Window size - and Acknowledgment number
Auto - Desirable - and On

50. What are two characteristics of 'store and forward' switching?
Configure the switch so that it has lower priority than other switches in the network
Encapsulations PPP and authentication CHAP
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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length