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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. 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
Data link
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Learning - Listening - and Forwarding

2. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
To allow remote management of the switch.
The sequence number in the TCP header.
VLAN and Swtich

3. Which OSI layer header contains the address of a destination host that is on another network?
Increased latency and Filtering of all frame errors
Device Identifiers - Capabilities list - Platform
This is an Ethernet port operating at half duplex
Network

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)
Switches increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
A broadcast address will never be the source address of a frame

5. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
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.
A hub and A repeater.
Layer 4
VTP will allow switches to share VLAN configuration information

6. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
It operates without collisions and It provides faster data transfer
The sequence number in the TCP header.
Information about a route should never be sent back in the direction from which the original update came.

7. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the 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.
Show arp and Show interface
100 meters
Duplex mismatch

8. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Application
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

9. 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
Decrease the window size.
Layer 3
Encapsulations PPP and authentication CHAP

10. 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.
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.
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.

11. 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 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 is used to prevent switching loops in networks with redundant switched routes.
VTP will allow switches to share VLAN configuration information
Port security

12. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
An electrical pulse indicates that the collision has cleared.
802.1Q and ISL

13. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.
VLAN and Swtich
Packet switching - Packet filtering and Internetwork communication.

14. 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?
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
Configure the switch so that it has a lower priority than other switches in the network.
The system is malfunctioning.
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.

15. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Configure the switch so that it has a lower priority than other switches in the network.
The port is experiencing errors

16. 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?
The interfaces must be configured for NAT.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Switches increase the number of collision domains in the 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

17. What is the IEEE standard associated with Gigabit Ethernet?
The network layer
802.3ab and 802.3z
The port is experiencing errors
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

18. 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.
Auto - On - and Desirable
Application
Learning - Listening - and Forwarding
802.1Q and ISL

19. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
In an improperly implemented redundant topology
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

20. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.
The Bridgeg ID and The bridge priority
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.

21. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Layer 4
The interfaces must be configured for NAT.
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

22. 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?
Show arp and Show interface
The switch will forward the frame to a specific port
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Layer 4

23. 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?
Packet switching - Packet filtering and Internetwork communication.
A hub and A repeater.
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

24. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Layer 4
Switches increase the number of collision domains in the network.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

25. 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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
ARP and ICMP
In an improperly implemented redundant topology

26. 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 system is malfunctioning.
Layer 3
Serial0/1 is down - line protocol is down
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

27. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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.
STP

28. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

29. 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.
In an improperly implemented redundant topology
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
It will prevent segment 1's broadcasts from getting to segment 2.

30. Which of the protocols below use TCP at the transport layer?
Show arp and Show interface
SMTP - FTP - HTTP - and HTTPS
Certkiller B > trace
SMTP FTP and HTTP

31. 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
This is an Ethernet port operating at half duplex
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
Configure the switch so that it has lower priority than other switches in the network

32. As a CCNA candidate - you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model?
This is an Ethernet port operating at half duplex
Learning - Listening - and Forwarding
Physical Layer and Datalink Layer
Telnet and FTP

33. 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 CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Source Port - Acknowledgment Number - and Window
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
802.3ab and 802.3z

34. 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?
Switches increase the number of collision domains in the network.
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
To allow remote management of the switch.

35. 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?
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.
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.
802.1Q and ISL

36. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
All switch and bridge ports are in either the forwarding or blocking state.
Show cdp neighbor detail
Encapsulations PPP and authentication CHAP

37. Which of the following are true of Ethernet technology?
TCP
Hosts use a logical bus topology
Network
It is the sum of the costs based on bandwidth

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

39. 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?
Packet switching - Packet filtering and Internetwork communication.
An additional broadcast domain will be created.
Switches increase the number of collision domains in the network.
Increased latency and Filtering of all frame errors

40. 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 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.
It operates without collisions and It provides faster data transfer
Duplex mismatch

41. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
STP
A cross-over cable
A hub and A repeater.

42. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The network layer
Device Identifiers - Capabilities list - Platform
Auto - On - and Desirable

43. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Application
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The network layer

44. 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?
Configure the switch so that it has a lower priority than other switches in the network.
Data link
Sequence number - Window size - and Acknowledgment number
Information about a route should never be sent back in the direction from which the original update came.

45. 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.)
MAC Address and Bridge Priority
It will prevent segment 1's broadcasts from getting to segment 2.
Configure the switch so that it has a lower priority than other switches in the network.
Layer 4

46. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Auto - On - and Desirable
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.
Telnet and FTP
Layer 4

47. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Decrease the window size.
Encapsulations PPP and authentication CHAP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

48. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Duplex mismatch
Application
Information about a route should never be sent back in the direction from which the original update came.

49. 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
It operates without collisions and It provides faster data transfer
The system is malfunctioning.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

50. You are logged into a router and wish to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?
Show cdp neighbor detail
100 meters
ARP and ICMP
Switches increase the number of collision domains in the network.