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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. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Data link
Layer 4
MAC Address and Bridge Priority

2. 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.
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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

3. What are two characteristics of 'store and forward' switching?
Layer 4
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.
Application
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

4. 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 Bridgeg ID and The bridge priority
Fiber optic cable.
An electrical pulse indicates that the collision has cleared.
It will prevent segment 1's broadcasts from getting to segment 2.

5. Which of the following correctly describe the various functions and virtues of a router?
Configure the switch so that it has a lower priority than other switches in the network.
The system is malfunctioning.
Duplex mismatch
Packet switching - Packet filtering and Internetwork communication.

6. 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?
SMTP - FTP - HTTP - and HTTPS
This is an Ethernet port operating at half duplex
A broadcast address will never be the source address of a frame
Port security

7. 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?
Configure the switch so that it has a lower priority than other switches in the network.
HTTPS
Layer 3
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

8. 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)
VLAN and Swtich
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Application
Sequence number - Window size - and Acknowledgment number

9. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
Configure the switch so that it has lower priority than other switches in the network
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.
Show arp and Show interface

10. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
VTP
Hosts use a logical bus topology
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.

11. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Learning - Listening - and Forwarding
The network layer
HTTPS
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

12. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
Decrease the window size.
The network layer
VTP

13. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Network
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Network

14. Which of the following can lead to the contribution of LAN traffic congestion?
The network layer
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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
CertK Switch(config)# ip default-gateway 192.168.1.115

15. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
Port security
Application
Duplex mismatch

16. 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?
The port is experiencing errors
A hub and A repeater.
Show cdp neighbor detail
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

17. 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?
TCP
SMTP - FTP - HTTP - and HTTPS
Hosts use a logical bus topology
Switches increase the number of collision domains in the network.

18. 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
VTP will allow switches to share VLAN configuration information
Learning - Listening - and Forwarding
Increased latency and Filtering of all frame errors

19. 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?
Transport
ARP and ICMP
Increased latency and Filtering of all frame errors
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.

20. 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
Show arp and Show interface
The interfaces must be configured for NAT.
A cross-over cable

21. Which of the following are spanning tree port states?
802.3ab and 802.3z
Learning - Listening - and Forwarding
A broadcast address will never be the source address of a frame
Information about a route should never be sent back in the direction from which the original update came.

22. Which of the following correctly describe steps in the OSI date encapsulation process?
Congestion avoidance - Windowing and Buffering
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.
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.

23. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Sequence number - Window size - and Acknowledgment number
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.
Information about a route should never be sent back in the direction from which the original update came.

24. 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?
An additional broadcast domain will be created.
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 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.
VTP

25. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
Sequence number - Window size - and Acknowledgment number
Buffering - Cut-through - and Congestion avoidance
Data link

26. 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
Configure the switch so that it has a lower priority than other switches in the network.
Data link
802.1Q and ISL
Packet switching - Packet filtering and Internetwork communication.

27. 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
MAC Address and Bridge Priority
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.
It operates without collisions and It provides faster data transfer
The network layer

28. 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
Configure the switch so that it has lower priority than other switches in the network
Hosts use a logical bus topology
Source Port - Acknowledgment Number - and Window
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.

29. 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
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
Telnet and FTP
Configure the switch so that it has lower priority than other switches in the network

30. 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?
This is an Ethernet port operating at half duplex
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.
VLAN and Swtich
It will prevent segment 1's broadcasts from getting to segment 2.

31. 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 will prevent segment 1's broadcasts from getting to segment 2.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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.

32. when files are transferred between a host and an FTP server - the data is divided into smaller pieces of transmission. As these pieces arrive at the destination host they must be reassembled to reconstruct the original file. What provides for the rea
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
Network
The sequence number in the TCP header.
It is used to prevent switching loops in networks with redundant switched routes.

33. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
802.3ab and 802.3z
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
It will prevent segment 1's broadcasts from getting to segment 2.

34. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Learning - Listening - and Forwarding
VTP will allow switches to share VLAN configuration information
Data link
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

35. 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.
It will prevent segment 1's broadcasts from getting to segment 2.
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.
HTTPS

36. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
STP
ARP and ICMP
The network layer
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.

37. 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?
Show cdp neighbor detail
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The network layer
VTP

38. 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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39. 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?
The port is experiencing errors
The network layer
Switches increase the number of collision domains in the network.
MAC Address and Bridge Priority

40. 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
To allow remote management of the switch.
Layer 3
Configure the switch so that it has lower priority than other switches in the network
VLAN and Swtich

41. 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?
Physical Layer and Datalink Layer
Switches increase the number of collision domains in the network.
Data link
SMTP - FTP - HTTP - and HTTPS

42. 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?
VTP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Configure the switch so that it has a lower priority than other switches in the network.

43. 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.
A broadcast address will never be the source address of a frame
Fiber optic cable.
Packet switching - Packet filtering and Internetwork communication.

44. 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
Show arp and Show interface
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
Switches increase the number of collision domains in the network.
The interfaces must be configured for NAT.

45. 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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Network
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Duplex mismatch

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?
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
Path selections and Packet switching.
Serial0/1 is down - line protocol is down

47. Which three of the protocols below belong to the application layer? (Select three answer choices)
The interfaces must be configured for NAT.
HTTPS - SMTP - and TFTP
TCP
Device Identifiers - Capabilities list - Platform

48. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Congestion avoidance - Windowing and Buffering
Configure the switch so that it has lower priority than other switches in the network

49. Which OSI layer header contains the address of a destination host that is on another network?
The interfaces must be configured for NAT.
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 hub and A repeater.
Network

50. 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.)
VTP will allow switches to share VLAN configuration information
It is used to prevent switching loops in networks with redundant switched routes.
MAC Address and Bridge Priority
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.