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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. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
Switches increase the number of collision domains in the network.
A broadcast address will never be the source address of a frame
A cross-over cable

2. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Congestion avoidance - Windowing and Buffering
802.1Q and ISL
It is the sum of the costs based on bandwidth
Switches increase the number of collision domains in the network.

3. 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?
100 meters
The network layer
Configure the switch so that it has 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.

4. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
Telnet and FTP
To prevent switching loops in networks with redundant switched paths.
SMTP - FTP - HTTP - and HTTPS

5. 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
Configure the switch so that it has lower priority than other switches in the network
Application
802.1Q and ISL

6. 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 will prevent segment 1's broadcasts from getting to segment 2.
VTP
The sequence number in the TCP header.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

7. 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
Fiber optic cable.
A cross-over cable
VTP will allow switches to share VLAN configuration information
Telnet and FTP

8. 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
100 meters
Application
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.
Show arp and Show interface

9. 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?
Layer 3
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The network layer
Port security

10. Which three of the protocols below belong to the application layer? (Select three answer choices)
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
HTTPS - SMTP - and TFTP
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
Device Identifiers - Capabilities list - Platform

11. By default - which of the following factors determines the spanning-tree path cost?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It is the sum of the costs based on bandwidth
Congestion avoidance - Windowing and Buffering
The network layer

12. 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?
Layer 4
Sequence number - Window size - and Acknowledgment number
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Show arp and Show interface

13. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Layer 4
Encapsulations PPP and authentication CHAP
The network layer
Data link

14. 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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15. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
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.
ARP and ICMP
Switches increase the number of collision domains in the network.

16. 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?
STP
Certkiller B > trace
CertK Switch(config)# ip default-gateway 192.168.1.115
Duplex mismatch

17. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Telnet and FTP
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

18. 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
Source Port - Acknowledgment Number - and Window
Increased latency and Filtering of all frame errors
Path selections and Packet switching.
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.

19. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
Duplex mismatch
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Physical Layer and Datalink Layer

20. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A cross-over cable
VTP will allow switches to share VLAN configuration information
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Packet switching - Packet filtering and Internetwork communication.

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?
Path selections and Packet switching.
STP
This is an Ethernet port operating at half duplex
Switches increase the number of collision domains in the network.

22. 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 broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
A cross-over cable
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
A hub and A repeater.

23. As a Certkiller trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
To allow remote management of the switch.
It is used to prevent switching loops in networks with redundant switched routes.
CertK Switch(config)# ip default-gateway 192.168.1.115
Telnet and FTP

24. Which of the following are true of Ethernet technology?
SMTP FTP and HTTP
Transport
Hosts use a logical bus topology
VTP will allow switches to share VLAN configuration information

25. 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?
Application
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Data link

26. With regard to Ethernet media access methods - which of the following are true?
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.
All switch and bridge ports are in either the forwarding or blocking state.
Auto - On - and Desirable
Telnet and FTP

27. 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
CertK Switch(config)# ip default-gateway 192.168.1.115
MAC Address and Bridge Priority
Show cdp neighbor detail
Duplex mismatch

28. 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
Encapsulations PPP and authentication CHAP
Network
The network layer
To allow remote management of the switch.

29. 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)
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Certkiller B > trace
Network
Information about a route should never be sent back in the direction from which the original update came.

30. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Hosts use a logical bus topology
Application
Information about a route should never be sent back in the direction from which the original update came.
The network layer

31. What is the purpose of the spanning-tree algorithm in a switched LAN?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
To prevent switching loops in networks with redundant switched paths.
The sequence number in the TCP header.
It is used to prevent switching loops in networks with redundant switched routes.

32. 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 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.
An additional broadcast domain will be created.
Show arp and Show interface
The switch will forward the frame to a specific port

33. 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?
To prevent switching loops in networks with redundant switched paths.
Configure the switch so that it has a lower priority than other switches in the network.
HTTPS
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

34. 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?
Show cdp neighbor detail
Configure the switch so that it has a lower priority than other switches in the network.
Decrease the window size.
The port is experiencing errors

35. 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?
Application
Hosts use a logical bus topology
Congestion avoidance - Windowing and Buffering
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

36. 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
Configure the switch so that it has a lower priority than other switches in the network.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Telnet and FTP

37. 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
Network
Data link
Telnet and FTP

38. 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 switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Layer 3
Telnet and FTP

39. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Port security
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
It operates without collisions and It provides faster data transfer
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

40. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
An additional broadcast domain will be created.
All switch and bridge ports are in either the forwarding or blocking state.
Telnet and FTP
Encapsulations PPP and authentication CHAP

41. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Auto - Desirable - and On
Hosts use a logical bus topology
Layer 4
Switches - Bridges - and Routers

42. 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?
Auto - On - and Desirable
Show cdp neighbor detail
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Serial0/1 is down - line protocol is down

43. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
STP
Certkiller B > trace
Packet switching - Packet filtering and Internetwork communication.

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?
100 meters
To allow remote management of the switch.
Certkiller B > trace
An additional broadcast domain will be created.

45. Why is full-duplex Ethernet superior to its single-duplex counterpart?
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.
It operates without collisions and It provides faster data transfer
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.

46. Which of the following correctly describe steps in the OSI date encapsulation process?
A cross-over cable
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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
HTTPS

47. 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 Bridgeg ID and The bridge priority
Duplex mismatch
100 meters
Data link

48. 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?
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.
Transport
MAC Address and Bridge Priority
Serial0/1 is down - line protocol is down

49. 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 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.
Packet switching - Packet filtering and Internetwork communication.
Layer 3
Layer 4

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
MAC Address and Bridge Priority
The Bridgeg ID and The bridge priority
Learning - Listening - and Forwarding