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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. 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?
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
A broadcast address will never be the source address of a frame

2. 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
Learning - Listening - and Forwarding
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Configure the switch so that it has a lower priority than other switches in the network.
It is the sum of the costs based on bandwidth

3. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Learning - Listening - and Forwarding
Switches increase the number of collision domains in the network.
Network
Switches - Bridges - and Routers

4. 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
The interfaces must be configured for NAT.
Information about a route should never be sent back in the direction from which the original update came.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Data link

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?
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Show cdp neighbor detail
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

6. 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?
Duplex mismatch
It is used to prevent switching loops in networks with redundant switched routes.
The port is experiencing errors
ARP and ICMP

7. What kind of cable should be used to establish a trunked line between two Catalyst switches?
The switch will forward the frame to a specific port
A cross-over cable
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

8. A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role of the Root Bridge?
Configure the switch so that it has a lower priority than other switches in the network.
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.
The switch will forward the frame to a specific port
Layer 3

9. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Hosts use a logical bus topology
Sequence number - Window size - and Acknowledgment number
VTP will allow switches to share VLAN configuration information
A broadcast address will never be the source address of a frame

10. 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
Information about a route should never be sent back in the direction from which the original update came.
Fiber optic cable.
TCP
Packet switching - Packet filtering and Internetwork communication.

11. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
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.
A broadcast address will never be the source address of a frame
This is an Ethernet port operating at half duplex

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?
A hub and A repeater.
Buffering - Cut-through - and Congestion avoidance
HTTPS - SMTP - and TFTP
To allow remote management of the switch.

13. 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?
Application
VTP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The system is malfunctioning.

14. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
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.
The Bridgeg ID and The bridge priority
802.1Q and ISL

15. 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
It will prevent segment 1's broadcasts from getting to segment 2.
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
VLAN and Swtich
Switches increase the number of collision domains in the network.

16. 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?
Switches increase the number of collision domains in the network.
VTP
Application
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

17. Which OSI layer header contains the address of a destination host that is on another network?
Network
Certkiller B > trace
Information about a route should never be sent back in the direction from which the original update came.
Configure the switch so that it has a lower priority than other switches in the network.

18. 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
Transport
Show arp and Show interface
The network layer
The switch will forward the frame to a specific port

19. Which fields are included in the TCP header?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Source Port - Acknowledgment Number - and Window
Buffering - Cut-through - and Congestion avoidance
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

20. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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 cross-over cable
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.
It operates without collisions and It provides faster data transfer

21. 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
Packet switching - Packet filtering and Internetwork communication.
To allow remote management of the switch.
TCP
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.

22. 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?
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
The Bridgeg ID and The bridge priority
Decrease the window size.

23. Which of the following can lead to the contribution of LAN traffic congestion?
A cross-over cable
Switches increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Network

24. 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.
Serial0/1 is down - line protocol is down
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

25. 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 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.
Layer 4
It is the sum of the costs based on bandwidth
MAC Address and Bridge Priority

26. 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?
The interfaces must be configured for NAT.
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.
100 meters
The network layer

27. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The sequence number in the TCP header.
Layer 3
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

28. 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?
SMTP FTP and HTTP
Device Identifiers - Capabilities list - Platform
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
802.3ab and 802.3z

29. 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?
Auto - Desirable - and On
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
A hub and A repeater.
Congestion avoidance - Windowing and Buffering

30. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Buffering - Cut-through - and Congestion avoidance
A broadcast address will never be the source address of a frame
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
TCP

31. 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.
The interfaces must be configured for NAT.
Auto - On - and Desirable
Serial0/1 is down - line protocol is down

32. 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
The network layer
Port security
It is the sum of the costs based on bandwidth
Source Port - Acknowledgment Number - and Window

33. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Switches increase the number of collision domains in the network.
802.1Q and ISL
Configure the switch so that it has lower priority than other switches in the network
Packet switching - Packet filtering and Internetwork communication.

34. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
A cross-over cable
Encapsulations PPP and authentication CHAP
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
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.

35. Which of the following correctly describe the various functions and virtues of a router?
A hub and A repeater.
Packet switching - Packet filtering and Internetwork communication.
TCP
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.

36. Which of the following are true of Ethernet technology?
To prevent switching loops in networks with redundant switched paths.
A broadcast address will never be the source address of a frame
Hosts use a logical bus topology
Application

37. 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?
Switches - Bridges - and Routers
A hub and A repeater.
This is an Ethernet port operating at half duplex
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

38. What is the purpose of the spanning-tree algorithm in a switched LAN?
It is used to prevent switching loops in networks with redundant switched routes.
Encapsulations PPP and authentication CHAP
To prevent switching loops in networks with redundant switched paths.
Application

39. Which of the following correctly describe steps in the OSI date encapsulation process?
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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Layer 3
Telnet and FTP

40. Which protocol uses TCP port 443 at layer 4?
The network layer
A hub and A repeater.
HTTPS
Transport

41. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Configure the switch so that it has a lower priority than other switches in the network.
Data link
Path selections and Packet switching.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

42. What are two characteristics of 'store and forward' switching?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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
Physical Layer and Datalink Layer
100 meters

43. 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
VTP will allow switches to share VLAN configuration information
The network layer
TCP

44. 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?
Application
To allow remote management of the switch.
100 meters
ARP and ICMP

45. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
VLAN and Swtich
It is the sum of the costs based on bandwidth
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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

46. A Certkiller Ethernet switch receives a unicast frame with a destination MAC that IS listed in the switch table. What will this switch do with the frame?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Layer 3
The switch will forward the frame to a specific port
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.

47. 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.
The interfaces must be configured for NAT.
Switches - Bridges - and Routers
Configure the switch so that it has a lower priority than other switches in the network.

48. By default - which of the following factors determines the spanning-tree path cost?
Application
Hosts use a logical bus topology
It is the sum of the costs based on bandwidth
It will prevent segment 1's broadcasts from getting to segment 2.

49. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Application
MAC Address and Bridge Priority
All switch and bridge ports are in either the forwarding or blocking state.
Serial0/1 is down - line protocol is down

50. 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?
SMTP FTP and HTTP
STP
It is the sum of the costs based on bandwidth
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.