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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 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 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.
Switches increase the number of collision domains in the network.
TCP

2. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
It operates without collisions and It provides faster data transfer
VLAN and Swtich
It will prevent segment 1's broadcasts from getting to segment 2.
STP

3. A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch?
In an improperly implemented redundant topology
Port security
VLAN and Swtich
Congestion avoidance - Windowing and Buffering

4. 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)
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.
Fiber optic cable.
CertK Switch(config)# ip default-gateway 192.168.1.115
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

5. 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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6. 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 hub and A repeater.
This is an Ethernet port operating at half duplex
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

7. 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.
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.
Transport
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

8. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
MAC Address and Bridge Priority
Data link
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

9. 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?
The network layer
Increased latency and Filtering of all frame errors
Information about a route should never be sent back in the direction from which the original update came.
Telnet and FTP

10. 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?
TCP
Sequence number - Window size - and Acknowledgment number
VLAN and Swtich
An electrical pulse indicates that the collision has cleared.

11. 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 operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Layer 3
STP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

12. As a CCNA candidate - you must know the various layers of the OSI model. At which layers of the OSI model do Wide Area Networks operate in?
Show arp and Show interface
MAC Address and Bridge Priority
Physical Layer and Datalink Layer
HTTPS - SMTP - and TFTP

13. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
In an improperly implemented redundant topology
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
SMTP FTP and HTTP

14. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
Increased latency and Filtering of all frame errors
It is used to prevent switching loops in networks with redundant switched routes.
Buffering - Cut-through - and Congestion avoidance

15. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Serial0/1 is down - line protocol is down
Buffering - Cut-through - and Congestion avoidance
Configure the switch so that it has a lower priority than other switches in the network.
Network

16. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Hosts use a logical bus topology
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
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

17. 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?
To prevent switching loops in networks with redundant switched paths.
VTP
Data link
The port is experiencing errors

18. 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?
Port security
To allow remote management of the switch.
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.
Configure the switch so that it has lower priority than other switches in the network

19. 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?
Layer 3
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Configure the switch so that it has a lower priority than other switches in the network.
All switch and bridge ports are in either the forwarding or blocking state.

20. 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 hub and A repeater.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
MAC Address and Bridge Priority
TCP

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?
HTTPS - SMTP - and TFTP
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.
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.

22. 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?
Hosts use a logical bus topology
Switches - Bridges - and Routers
A hub and A repeater.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

23. CDP is running between two CK devices. What information is supplied by CDP?
Fiber optic cable.
Layer 4
Device Identifiers - Capabilities list - Platform
Certkiller B > trace

24. 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?
HTTPS - SMTP - and TFTP
SMTP FTP and HTTP
A broadcast address will never be the source address of a frame
A hub and A repeater.

25. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
Decrease the window size.
It is used to prevent switching loops in networks with redundant switched routes.
Duplex mismatch

26. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Sequence number - Window size - and Acknowledgment number
HTTPS - SMTP - and TFTP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.

27. 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?
The interfaces must be configured for NAT.
Telnet and FTP
TCP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

28. Which of the following are types of flow control?
Data link
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
HTTPS - SMTP - and TFTP
Buffering - Cut-through - and Congestion avoidance

29. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.
Sequence number - Window size - and Acknowledgment number
Decrease the window size.

30. 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
A hub and A repeater.
100 meters
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.

31. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Data link
Switches increase the number of collision domains in the network.
VTP will allow switches to share VLAN configuration information
Encapsulations PPP and authentication CHAP

32. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
To allow remote management of the switch.
A cross-over cable
In an improperly implemented redundant topology
The sequence number in the TCP header.

33. 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?
VTP
VTP will allow switches to share VLAN configuration information
Fiber optic cable.
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

34. Which of the following are spanning tree port states?
Switches increase the number of collision domains in the network.
Fiber optic cable.
HTTPS - SMTP - and TFTP
Learning - Listening - and Forwarding

35. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
SMTP - FTP - HTTP - and HTTPS
A cross-over cable
Auto - On - and Desirable

36. 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
Physical Layer and Datalink Layer
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

37. By default - which of the following factors determines the spanning-tree path cost?
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.
It is the sum of the costs based on bandwidth
Decrease the window size.

38. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
An electrical pulse indicates that the collision has cleared.
Sequence number - Window size - and Acknowledgment number
Learning - Listening - and Forwarding

39. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
Increased latency and Filtering of all frame errors
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The interfaces must be configured for NAT.

40. Which OSI layer header contains the address of a destination host that is on another network?
Auto - On - and Desirable
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 lower priority than other switches in the network
Network

41. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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 broadcast address will never be the source address of a frame
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.
Learning - Listening - and Forwarding

42. 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.
Show cdp neighbor detail
802.1Q and ISL
Physical Layer and Datalink Layer

43. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Configure the switch so that it has lower priority than other switches in the network
A broadcast address will never be the source address of a frame
The sequence number in the TCP header.
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.

44. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
Network
Serial0/1 is down - line protocol is down
A cross-over cable

45. 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
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
A cross-over cable
Network

46. 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?
An additional broadcast domain will be created.
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
Data link
VTP

47. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
A hub and A repeater.
Telnet and FTP
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.

48. With regard to Ethernet media access methods - which of the following are true?
The system is malfunctioning.
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
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.

49. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Path selections and Packet switching.
Hosts use a logical bus topology
Switches - Bridges - and Routers
Telnet and FTP

50. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Network
MAC Address and Bridge Priority
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
Switches increase the number of collision domains in the network.