Test your basic knowledge |

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 of the following services use TCP?
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.
SMTP FTP and HTTP
The port is experiencing errors
HTTPS

2. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
The switch will forward the frame to a specific port
Application
A cross-over cable
A broadcast address will never be the source address of a frame

3. Which of the following are types of flow control?
Information about a route should never be sent back in the direction from which the original update came.
Buffering - Cut-through - and Congestion avoidance
The port is experiencing errors
Increased latency and Filtering of all frame errors

4. What is the IEEE standard associated with Gigabit Ethernet?
Sequence number - Window size - and Acknowledgment number
802.3ab and 802.3z
Telnet and FTP
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

5. In a switched LAN network - What is the Spanning-Tree algorithm used for?
VTP
It is used to prevent switching loops in networks with redundant switched routes.
802.1Q and ISL
Port security

6. 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?
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.
The Bridgeg ID and The bridge priority
An electrical pulse indicates that the collision has cleared.
Application

7. With regard to Ethernet media access methods - which of the following are true?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.
It will prevent segment 1's broadcasts from getting to segment 2.
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.

8. 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.
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.
Hosts use a logical bus topology

9. 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?
Configure the switch so that it has lower priority than other switches in the network
To prevent switching loops in networks with redundant switched paths.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

10. Which three of the protocols below belong to the application layer? (Select three answer choices)
Application
Decrease the window size.
HTTPS - SMTP - and TFTP
A hub and A repeater.

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

12. 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
Duplex mismatch
Layer 4
HTTPS - SMTP - and TFTP
The sequence number in the TCP header.

13. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Device Identifiers - Capabilities list - Platform
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
TCP
Show cdp neighbor detail

14. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Certkiller B > trace
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 cdp neighbor detail

15. 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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Hosts use a logical bus topology
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Application

16. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Increased latency and Filtering of all frame errors
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
An electrical pulse indicates that the collision has cleared.

17. 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
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Port security
An electrical pulse indicates that the collision has cleared.
The network layer

18. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
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 system is malfunctioning.
Decrease the window size.

19. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
100 meters
The Bridgeg ID and The bridge priority
The switch will forward the frame to a specific port

20. Which protocol uses TCP port 443 at layer 4?
Packet switching - Packet filtering and Internetwork communication.
All switch and bridge ports are in either the forwarding or blocking state.
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.
HTTPS

21. 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 sequence number in the TCP header.
This is an Ethernet port operating at half duplex
To prevent switching loops in networks with redundant switched paths.
The port is experiencing errors

22. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
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.
It is used to prevent switching loops in networks with redundant switched routes.
802.1Q and ISL
VLAN and Swtich

23. 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?
The Bridgeg ID and The bridge priority
Information about a route should never be sent back in the direction from which the original update came.
Certkiller B > trace
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

24. 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?
Layer 3
Port security
Show arp and Show interface
802.1Q and ISL

25. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Telnet and FTP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Increased latency and Filtering of all frame errors
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

26. 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?
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.
100 meters
Layer 3
Telnet and FTP

27. 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?
Configure the switch so that it has a lower priority than other switches in the network.
The switch will forward the frame to a specific port
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.
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. 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?
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.
This is an Ethernet port operating at half duplex
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

29. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Auto - On - and Desirable
ARP and ICMP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

30. 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?
To prevent switching loops in networks with redundant switched paths.
Fiber optic cable.
Source Port - Acknowledgment Number - and Window
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.

31. 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?
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.
An additional broadcast domain will be created.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Decrease the window size.

32. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Configure the switch so that it has lower priority than other switches in the network
The system is malfunctioning.
All switch and bridge ports are in either the forwarding or blocking state.

33. 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?
Network
Information about a route should never be sent back in the direction from which the original update came.
VTP
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

34. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The system is malfunctioning.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Certkiller B > trace

35. What is the purpose of the spanning-tree algorithm in a switched LAN?
HTTPS - SMTP - and TFTP
To prevent switching loops in networks with redundant switched paths.
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 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.

36. Which of the protocols below use TCP at the transport layer?
The system is malfunctioning.
The switch will forward the frame to a specific port
SMTP - FTP - HTTP - and HTTPS
Switches - Bridges - and Routers

37. 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
Network
Data link
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.

38. 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?
Switches increase the number of collision domains in the network.
Layer 3
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.
Layer 4

39. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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
Congestion avoidance - Windowing and Buffering

40. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
Serial0/1 is down - line protocol is down
Layer 3
Network

41. 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?
ARP and ICMP
Show arp and Show interface
It is the sum of the costs based on bandwidth
100 meters

42. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
Information about a route should never be sent back in the direction from which the original update came.
Configure the switch so that it has lower priority than other switches in the network
Sequence number - Window size - and Acknowledgment number

43. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
SMTP FTP and HTTP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
VTP will allow switches to share VLAN configuration information
Layer 4

44. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

45. 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?
Physical Layer and Datalink Layer
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.
Buffering - Cut-through - and Congestion avoidance
Path selections and Packet switching.

46. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
A broadcast domain with too many hosts - Broadcast storms - and Low 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.
Buffering - Cut-through - and Congestion avoidance

47. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
A broadcast address will never be the source address of a frame
Congestion avoidance - Windowing and Buffering
Device Identifiers - Capabilities list - Platform

48. Which of the following can lead to the contribution of LAN traffic congestion?
Duplex mismatch
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
It will prevent segment 1's broadcasts from getting to segment 2.
Show arp and Show interface

49. 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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Switches increase the number of collision domains in the network.
Device Identifiers - Capabilities list - Platform
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

50. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
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 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.
Device Identifiers - Capabilities list - Platform