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. 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?
Buffering - Cut-through - and Congestion avoidance
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.
Sequence number - Window size - and Acknowledgment number
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.

2. 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?
Congestion avoidance - Windowing and Buffering
Layer 3
Show arp and Show interface
A hub and A repeater.

3. 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?
Hosts use a logical bus topology
Buffering - Cut-through - and Congestion avoidance
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
CertK Switch(config)# ip default-gateway 192.168.1.115

4. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
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
Auto - On - and Desirable
VLAN and Swtich
It operates without collisions and It provides faster data transfer

5. 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
This is an Ethernet port operating at half duplex
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The network layer
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

6. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Data link
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

7. Which of the following devices can the Certkiller network administrator use to segment the LAN?
HTTPS - SMTP - and TFTP
VTP will allow switches to share VLAN configuration information
Switches - Bridges - and Routers
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

8. 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?
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.
The port is experiencing errors
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
It operates without collisions and It provides faster data transfer

9. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
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
All switch and bridge ports are in either the forwarding or blocking state.
Sequence number - Window size - and Acknowledgment number

10. 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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
A hub and A repeater.

11. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Information about a route should never be sent back in the direction from which the original update came.
Data link
All switch and bridge ports are in either the forwarding or blocking state.
Application

12. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
802.1Q and ISL
Data link
To prevent switching loops in networks with redundant switched paths.

13. 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
Encapsulations PPP and authentication CHAP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Hosts use a logical bus topology

14. 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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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
Fiber optic cable.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

15. Which OSI layer header contains the address of a destination host that is on another 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.
Configure the switch so that it has a lower priority than other switches in the network.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Network

16. Which fields are included in the TCP header?
Layer 4
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Source Port - Acknowledgment Number - and Window

17. 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?
Packet switching - Packet filtering and Internetwork communication.
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
Path selections and Packet switching.
The network layer

18. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
Switches increase the number of collision domains in the network.
The network layer
The system is malfunctioning.

19. 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 receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The switch will forward the frame to a specific port
Encapsulations PPP and authentication CHAP
Configure the switch so that it has lower priority than other switches in the network

20. 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?
Increased latency and Filtering of all frame errors
VTP will allow switches to share VLAN configuration information
Auto - On - and Desirable
The network layer

21. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
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.
VTP will allow switches to share VLAN configuration information
Layer 4

22. 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)
Configure the switch so that it has a lower priority than other switches in the network.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

23. 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
A cross-over cable
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for 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.

24. 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?
Device Identifiers - Capabilities list - Platform
Certkiller B > trace
It will prevent segment 1's broadcasts from getting to segment 2.
Layer 4

25. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
The switch will forward the frame to a specific port
Information about a route should never be sent back in the direction from which the original update came.
Data link
MAC Address and Bridge Priority

26. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
Show arp and Show interface
Certkiller B > trace
It is the sum of the costs based on bandwidth

27. By default - which of the following factors determines the spanning-tree path cost?
The switch will forward the frame to a specific port
Auto - Desirable - and On
Layer 4
It is the sum of the costs based on bandwidth

28. 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
The interfaces must be configured for NAT.
The network layer
This is an Ethernet port operating at half duplex

29. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Switches increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.

30. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
VTP will allow switches to share VLAN configuration information
Switches increase the number of collision domains in the network.
HTTPS - SMTP - and TFTP
STP

31. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
802.3ab and 802.3z
The system is malfunctioning.
Sequence number - Window size - and Acknowledgment number
Source Port - Acknowledgment Number - and Window

32. 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?
Hosts use a logical bus topology
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.
Auto - Desirable - and On

33. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Switches increase the number of collision domains in the network.
Port security
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.
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.

34. 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 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.
The port is experiencing errors
Show cdp neighbor detail
Serial0/1 is down - line protocol is down

35. Which of the following can lead to the contribution of LAN traffic congestion?
The network layer
An electrical pulse indicates that the collision has cleared.
Show cdp neighbor detail
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

36. 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
Sequence number - Window size - and Acknowledgment number
The sequence number in the TCP header.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Transport

37. 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?
TCP
Configure the switch so that it has a lower priority than other switches in the network.
Certkiller B > trace
Buffering - Cut-through - and Congestion avoidance

38. 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.
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.
VTP will allow switches to share VLAN configuration information

39. CDP is running between two CK devices. What information is supplied by CDP?
The Bridgeg ID and The bridge priority
Device Identifiers - Capabilities list - Platform
Switches - Bridges - and Routers
Serial0/1 is down - line protocol is down

40. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
Increased latency and Filtering of all frame errors
HTTPS - SMTP - and TFTP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

41. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Configure the switch so that it has a lower priority than other switches in the network.
SMTP FTP and HTTP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
802.1Q and ISL

42. What are two characteristics of 'store and forward' switching?
Device Identifiers - Capabilities list - Platform
Show arp and Show interface
The network layer
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

43. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
The switch will forward the frame to a specific port
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.
Encapsulations PPP and authentication CHAP
Certkiller B > trace

44. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Buffering - Cut-through - and Congestion avoidance
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Transport

45. 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?
802.1Q and ISL
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 cdp neighbor detail
Serial0/1 is down - line protocol is down

46. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Physical Layer and Datalink Layer
A broadcast address will never be the source address of a frame
An additional broadcast domain will be created.
Layer 4

47. 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
Serial0/1 is down - line protocol is down
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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Hosts use a logical bus topology

48. What is the purpose of the spanning-tree algorithm in a switched LAN?
It is the sum of the costs based on bandwidth
Serial0/1 is down - line protocol is down
To prevent switching loops in networks with redundant switched paths.
Device Identifiers - Capabilities list - Platform

49. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Auto - Desirable - and On
Information about a route should never be sent back in the direction from which the original update came.
Show arp and Show interface

50. 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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
MAC Address and Bridge Priority
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