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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
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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. 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?
Network
A hub and A repeater.
Port security
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

2. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
It is the sum of the costs based on bandwidth
An electrical pulse indicates that the collision has cleared.
Configure the switch so that it has lower priority than other switches in the 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

3. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
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.
Information about a route should never be sent back in the direction from which the original update came.
Decrease the window size.

4. 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?
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.
This is an Ethernet port operating at half duplex
HTTPS - SMTP - and TFTP
It operates without collisions and It provides faster data transfer

5. 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 broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Decrease the window size.
An additional broadcast domain will be created.
ARP and ICMP

6. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Transport
Buffering - Cut-through - and Congestion avoidance

7. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
It operates without collisions and It provides faster data transfer
Transport
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.
Show arp and Show interface

8. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VLAN and Swtich
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
VTP will allow switches to share VLAN configuration information

9. 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
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.
HTTPS - SMTP - and TFTP
VLAN and Swtich
100 meters

10. By default - which of the following factors determines the spanning-tree path cost?
HTTPS
It is the sum of the costs based on bandwidth
VTP
Sequence number - Window size - and Acknowledgment number

11. 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?
Increased latency and Filtering of all frame errors
Application
802.3ab and 802.3z
Serial0/1 is down - line protocol is down

12. Which of the following correctly describe the various functions and virtues of a router?
Network
Show cdp neighbor detail
Packet switching - Packet filtering and Internetwork communication.
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

13. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
This is an Ethernet port operating at half duplex
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
To allow remote management of the switch.
Path selections and Packet switching.

14. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
A hub and A repeater.
The network layer
Network

15. 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
MAC Address and Bridge Priority
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Increased latency and Filtering of all frame errors
Data link

16. 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
This is an Ethernet port operating at half duplex
Show cdp neighbor detail
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

17. 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
The port is experiencing errors
Certkiller B > trace
802.1Q and ISL
Show arp and Show interface

18. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
MAC Address and Bridge Priority
The interfaces must be configured for NAT.
VLAN and Swtich

19. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Buffering - Cut-through - and Congestion avoidance
Transport
Switches - Bridges - and Routers
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.

20. 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.)
Transport
The sequence number in the TCP header.
MAC Address and Bridge Priority
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.

21. 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?
It operates without collisions and It provides faster data transfer
Switches increase the number of collision domains in the 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
Source Port - Acknowledgment Number - and Window

22. Which protocol uses TCP port 443 at layer 4?
In an improperly implemented redundant topology
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
802.3ab and 802.3z
HTTPS

23. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
The switch will forward the frame to a specific 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.
CertK Switch(config)# ip default-gateway 192.168.1.115

24. 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 sequence number in the TCP header.
802.1Q and ISL
100 meters
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

25. 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?
To allow remote management of the switch.
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
An additional broadcast domain will be created.
Switches increase the number of collision domains in the network.

26. Which of the following are spanning tree port states?
Switches - Bridges - and Routers
Learning - Listening - and Forwarding
Configure the switch so that it has lower priority than other switches in the network
ARP and ICMP

27. 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
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.
Auto - On - and Desirable
HTTPS

28. 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?
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.
Learning - Listening - and Forwarding
Port security
Sequence number - Window size - and Acknowledgment number

29. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Encapsulations PPP and authentication CHAP
Serial0/1 is down - line protocol is down
Sequence number - Window size - and Acknowledgment number
Source Port - Acknowledgment Number - and Window

30. Which of following VLAN frame encapsulation types are configurable on a Cisco 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.
802.1Q and ISL
TCP
STP

31. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Transport
All switch and bridge ports are in either the forwarding or blocking state.
Packet switching - Packet filtering and Internetwork communication.
A broadcast address will never be the source address of a frame

32. 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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33. 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?
Encapsulations PPP and authentication CHAP
Certkiller B > trace
Layer 3
Data link

34. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
The interfaces must be configured for NAT.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

35. 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
Source Port - Acknowledgment Number - and Window
Information about a route should never be sent back in the direction from which the original update came.
In an improperly implemented redundant topology

36. 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?
Application
The interfaces must be configured for NAT.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A cross-over cable

37. 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?
Port security
Physical Layer and Datalink Layer
A cross-over cable
Increased latency and Filtering of all frame errors

38. Which of the following are true of Ethernet technology?
A hub and A repeater.
This is an Ethernet port operating at half duplex
Hosts use a logical bus topology
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

39. 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.
Auto - Desirable - and On
Show cdp neighbor detail
Serial0/1 is down - line protocol is down

40. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
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.
Path selections and Packet switching.
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

41. Which of the following are types of flow control?
It is used to prevent switching loops in networks with redundant switched routes.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Buffering - Cut-through - and Congestion avoidance
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

42. 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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The switch will forward the frame to a specific port
A broadcast address will never be the source address of a frame
Fiber optic cable.

43. Which of the following can lead to the contribution of LAN traffic congestion?
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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
SMTP - FTP - HTTP - and HTTPS
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

44. 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?
Layer 4
SMTP FTP and HTTP
Decrease the window size.
To allow remote management of the switch.

45. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
MAC Address and Bridge Priority
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.
Data link

46. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Configure the switch so that it has lower priority than other switches in the network
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
To prevent switching loops in networks with redundant switched paths.

47. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
ARP and ICMP
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.
Learning - Listening - and Forwarding
Show arp and Show interface

48. 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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
SMTP - FTP - HTTP - and HTTPS
HTTPS

49. Which three of the protocols below belong to the application layer? (Select three answer choices)
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
100 meters
HTTPS - SMTP - and TFTP
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. 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?
Information about a route should never be sent back in the direction from which the original update came.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Packet switching - Packet filtering and Internetwork communication.
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.

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