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. 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?
Switches increase the number of collision domains in the network.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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
Congestion avoidance - Windowing and Buffering

2. 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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The sequence number in the TCP header.
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.
Learning - Listening - and Forwarding

3. 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
Application
It will prevent segment 1's broadcasts from getting to segment 2.
Show arp and Show interface
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.

4. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.
A cross-over cable
Path selections and Packet switching.

5. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Serial0/1 is down - line protocol is down

6. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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.
Full-duplex Ethernet can provide higher throughput 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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

7. Which fields are included in the TCP header?
Data link
Source Port - Acknowledgment Number - and Window
VTP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

8. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The sequence number in the TCP header.
Congestion avoidance - Windowing and Buffering
MAC Address and Bridge Priority

9. 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 Bridgeg ID and The bridge priority
Port security
Layer 3
It will prevent segment 1's broadcasts from getting to segment 2.

10. What is the purpose of the spanning-tree algorithm in a switched LAN?
Congestion avoidance - Windowing and Buffering
MAC Address and Bridge Priority
It operates without collisions and It provides faster data transfer
To prevent switching loops in networks with redundant switched paths.

11. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
CertK Switch(config)# ip default-gateway 192.168.1.115
SMTP - FTP - HTTP - and HTTPS

12. 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?
Show cdp neighbor detail
Transport
802.3ab and 802.3z
100 meters

13. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Auto - Desirable - and On
Auto - On - and Desirable
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

14. 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)
Telnet and FTP
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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

15. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
VTP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Telnet and FTP
Switches increase the number of collision domains in the network.

16. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Serial0/1 is down - line protocol is down
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.
100 meters
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

17. Why is full-duplex Ethernet superior to its single-duplex counterpart?
The system is malfunctioning.
To allow remote management of the switch.
The switch will forward the frame to a specific port
It operates without collisions and It provides faster data transfer

18. Which of the following services use TCP?
Application
SMTP FTP and HTTP
Configure the switch so that it has lower priority than other switches in the network
Path selections and Packet switching.

19. 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?
Layer 3
The switch will forward the frame to a specific port
The network layer
ARP and ICMP

20. 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
It operates without collisions and It provides faster data transfer
Duplex mismatch
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Show arp and Show interface

21. Which two of the following values does STP take into consideration when it elects the root bridge?
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.
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
The Bridgeg ID and The bridge priority

22. 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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The network layer
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
Layer 4

23. 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?
VLAN and Swtich
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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.
802.1Q and ISL

24. 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
HTTPS
CertK Switch(config)# ip default-gateway 192.168.1.115
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

25. 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 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.
Congestion avoidance - Windowing and Buffering
A cross-over cable
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

26. 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
Application
Auto - Desirable - and On
Serial0/1 is down - line protocol is down

27. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
It is the sum of the costs based on bandwidth
Fiber optic cable.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

28. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
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
Auto - Desirable - and On
This is an Ethernet port operating at half duplex

29. 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.
100 meters
Decrease the window size.
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.

30. CDP is running between two CK devices. What information is supplied by CDP?
Fiber optic cable.
Sequence number - Window size - and Acknowledgment number
Device Identifiers - Capabilities list - Platform
VLAN and Swtich

31. Which of the following correctly describe the various functions and virtues of a router?
Device Identifiers - Capabilities list - Platform
Packet switching - Packet filtering and Internetwork communication.
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.

32. What is the IEEE standard associated with Gigabit Ethernet?
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 broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
802.3ab and 802.3z
Switches - Bridges - and Routers

33. 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.
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 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.
Network

34. 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
Switches - Bridges - and Routers
Physical Layer and Datalink Layer
An additional broadcast domain will be created.

35. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Increased latency and Filtering of all frame errors
Transport
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.
Duplex mismatch

36. 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?
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
Increased latency and Filtering of all frame errors
Physical Layer and Datalink Layer

37. 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 - Desirable - and On
This is an Ethernet port operating at half duplex
Application
STP

38. 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?
Serial0/1 is down - line protocol is down
To allow remote management of the switch.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Auto - On - and Desirable

39. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
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.
In an improperly implemented redundant topology
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

40. 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.)
It will prevent segment 1's broadcasts from getting to segment 2.
MAC Address and Bridge Priority
Layer 3
Serial0/1 is down - line protocol is down

41. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
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.
Layer 4
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Serial0/1 is down - line protocol is down

42. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
An electrical pulse indicates that the collision has cleared.
MAC Address and Bridge Priority
To prevent switching loops in networks with redundant switched paths.

43. 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?
Packet switching - Packet filtering and Internetwork communication.
Telnet and FTP
Certkiller B > trace
TCP

44. 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?
An additional broadcast domain will be created.
It is used to prevent switching loops in networks with redundant switched routes.
100 meters
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

45. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
VTP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Layer 4
Auto - Desirable - and On

46. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Path selections and Packet switching.
STP
Switches increase the number of collision domains in the network.
Application

47. Which of the protocols below use TCP at the transport layer?
Certkiller B > trace
Hosts use a logical bus topology
It operates without collisions and It provides faster data transfer
SMTP - FTP - HTTP - and HTTPS

48. 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.
To allow remote management of the switch.
Increased latency and Filtering of all frame errors
Switches increase the number of collision domains in the network.

49. 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?
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.
802.1Q and ISL
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
In an improperly implemented redundant topology

50. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Congestion avoidance - Windowing and Buffering
Increased latency and Filtering of all frame errors
It is the sum of the costs based on bandwidth
Layer 4