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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. 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
Layer 4
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
It will prevent segment 1's broadcasts from getting to segment 2.
Fiber optic cable.

2. 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?
Network
The switch will forward the frame to a specific port
An electrical pulse indicates that the collision has cleared.
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

3. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
It operates without collisions and It provides faster data transfer
Encapsulations PPP and authentication CHAP
It is used to prevent switching loops in networks with redundant switched routes.
Auto - Desirable - and On

4. 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?
Layer 4
Encapsulations PPP and authentication CHAP
Congestion avoidance - Windowing and Buffering
Application

5. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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
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.
It is used to prevent switching loops in networks with redundant switched routes.

6. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
SMTP - FTP - HTTP - and HTTPS
The sequence number in the TCP header.

7. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
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.
Layer 4
Transport
Port security

8. Which two of the following values does STP take into consideration when it elects the root bridge?
The port is experiencing errors
In an improperly implemented redundant topology
The Bridgeg ID and The bridge priority
The system is malfunctioning.

9. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
HTTPS - SMTP - and TFTP
Auto - On - and Desirable

10. 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?
Layer 3
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.
SMTP - FTP - HTTP - and HTTPS
A hub and A repeater.

11. Which of the protocols below use TCP at the transport layer?
The switch will forward the frame to a specific port
SMTP - FTP - HTTP - and HTTPS
Network
Application

12. 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?
Port security
Configure the switch so that it has a lower priority than other switches in the network.
The system is malfunctioning.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

13. Why is full-duplex Ethernet superior to its single-duplex counterpart?
An electrical pulse indicates that the collision has cleared.
Switches - Bridges - and Routers
It operates without collisions and It provides faster data transfer
Network

14. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Show arp and Show interface
Fiber optic 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.
All switch and bridge ports are in either the forwarding or blocking state.

15. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Decrease the window size.
Layer 3

16. 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.
MAC Address and Bridge Priority
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Auto - Desirable - and On

17. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
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.
Application
Source Port - Acknowledgment Number - and Window
Network

18. 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
A cross-over cable
Application
It is used to prevent switching loops in networks with redundant switched routes.
Duplex mismatch

19. 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
Auto - On - and Desirable
STP
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.

20. 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?
Switches increase the number of collision domains in the network.
Telnet and FTP
Congestion avoidance - Windowing and Buffering
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

21. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
All switch and bridge ports are in either the forwarding or blocking state.
A cross-over cable
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.
Physical Layer and Datalink Layer

22. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Data link
Physical Layer and Datalink Layer
Duplex mismatch
It is used to prevent switching loops in networks with redundant switched routes.

23. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
An electrical pulse indicates that the collision has cleared.
Information about a route should never be sent back in the direction from which the original update came.
Serial0/1 is down - line protocol is down
All switch and bridge ports are in either the forwarding or blocking state.

24. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
Sequence number - Window size - and Acknowledgment number
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

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.
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.
Port security
Information about a route should never be sent back in the direction from which the original update came.

26. 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
Source Port - Acknowledgment Number - and Window
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
An additional broadcast domain will be created.

27. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
All switch and bridge ports are in either the forwarding or blocking state.
Switches increase the number of collision domains in the network.
Congestion avoidance - Windowing and Buffering
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.

28. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Transport
An electrical pulse indicates that the collision has cleared.
Duplex mismatch
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

29. 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?
Network
The interfaces must be configured for NAT.
It operates without collisions and It provides faster data transfer
Configure the switch so that it has a lower priority than other switches in the network.

30. 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?
Configure the switch so that it has a lower priority than other switches in the network.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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
802.1Q and ISL

31. 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
Duplex mismatch
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 will prevent segment 1's broadcasts from getting to segment 2.
An additional broadcast domain will be created.

32. 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
Encapsulations PPP and authentication CHAP
Decrease the window size.
Auto - Desirable - and On

33. 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
A cross-over cable
Auto - Desirable - and On
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Telnet and FTP

34. 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.
STP
Show cdp neighbor detail
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.

35. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
HTTPS
Certkiller B > trace
All switch and bridge ports are in either the forwarding or blocking state.

36. 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?
An additional broadcast domain will be created.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
HTTPS - SMTP - and TFTP
Packet switching - Packet filtering and Internetwork communication.

37. 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?
Switches increase the number of collision domains in the network.
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
100 meters
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.

38. Which fields are included in the TCP header?
CertK Switch(config)# ip default-gateway 192.168.1.115
Hosts use a logical bus topology
Source Port - Acknowledgment Number - and Window
The system is malfunctioning.

39. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on 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.
VTP will allow switches to share VLAN configuration information
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

40. CDP is running between two CK devices. What information is supplied by CDP?
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.
Auto - On - and Desirable
Device Identifiers - Capabilities list - Platform
Learning - Listening - and Forwarding

41. 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
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Configure the switch so that it has lower priority than other switches in the network
It operates without collisions and It provides faster data transfer

42. 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?
Port security
Duplex mismatch
ARP and ICMP
The network layer

43. 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 sequence number in the TCP header.
The network layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Fiber optic cable.

44. 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?
VTP
Sequence number - Window size - and Acknowledgment number
In an improperly implemented redundant topology
Application

45. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
The system is malfunctioning.
An electrical pulse indicates that the collision has cleared.
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.

46. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
TCP
Layer 4
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

47. Which of the following services use TCP?
VTP
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP
Data link

48. 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
Decrease the window size.
Show arp and Show interface
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.

49. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location?
Application
Show arp and Show interface
VTP
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.

50. 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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The switch will forward the frame to a specific port
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth