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. 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
A hub and A repeater.
To allow remote management of the switch.
Data link

2. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The sequence number in the TCP header.
SMTP FTP and HTTP

3. 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)
Transport
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Data link
Sequence number - Window size - and Acknowledgment number

4. 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?
An electrical pulse indicates that the collision has cleared.
The switch will forward the frame to a specific port
VLAN and Swtich
Layer 4

5. 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?
Transport
Auto - On - and Desirable
To allow remote management of the switch.
Switches increase the number of collision domains in the network.

6. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
The system is malfunctioning.
Encapsulations PPP and authentication CHAP
ARP and ICMP

7. What kind of cable should be used to establish a trunked line between two Catalyst switches?
The port is experiencing errors
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Configure the switch so that it has lower priority than other switches in the network
A cross-over cable

8. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
An additional broadcast domain will be created.
The sequence number in the TCP header.
Auto - On - and Desirable
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

9. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
Layer 4
Source Port - Acknowledgment Number - and Window
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

10. 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.
An electrical pulse indicates that the collision has cleared.
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 - HTTP - and HTTPS

11. 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?
Switches increase the number of collision domains in the network.
Path selections and Packet switching.
Layer 4
CertK Switch(config)# ip default-gateway 192.168.1.115

12. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
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
Port security
Data link
An additional broadcast domain will be created.

13. 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
Transport
The sequence number in the TCP header.
An electrical pulse indicates that the collision has cleared.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

14. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Switches increase the number of collision domains in the network.
Layer 4
Increased latency and Filtering of all frame errors
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.

15. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Telnet and FTP
ARP and ICMP
HTTPS - SMTP - and TFTP

16. 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
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.
A hub and A repeater.
Serial0/1 is down - line protocol is down

17. 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?
Device Identifiers - Capabilities list - Platform
100 meters
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.
CertK Switch(config)# ip default-gateway 192.168.1.115

18. Which three of the protocols below belong to the application layer? (Select three answer choices)
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 port is experiencing errors
VTP
HTTPS - SMTP - and TFTP

19. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Auto - On - and Desirable
It will prevent segment 1's broadcasts from getting to segment 2.
An additional broadcast domain will be created.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

20. 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 CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Show arp and Show interface
Layer 3

21. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
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
Sequence number - Window size - and Acknowledgment number
Encapsulations PPP and authentication CHAP
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

22. Which of the following can lead to the contribution of LAN traffic congestion?
Certkiller B > trace
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Congestion avoidance - Windowing and Buffering
Network

23. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Telnet and FTP
The switch will forward the frame to a specific port
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

24. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Switches increase the number of collision domains in the network.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Increased latency and Filtering of all frame errors
A broadcast address will never be the source address of a frame

25. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
A cross-over cable
Certkiller B > trace
HTTPS

26. 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.
Information about a route should never be sent back in the direction from which the original update came.
A hub and A repeater.
Application
It is used to prevent switching loops in networks with redundant switched routes.

27. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
It is the sum of the costs based on bandwidth
An electrical pulse indicates that the collision has cleared.

28. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
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
HTTPS
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

29. 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
ARP and ICMP
Data link
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

30. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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.
It is the sum of the costs based on bandwidth
Application

31. 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 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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Data link

32. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
Fiber optic cable.
A hub and A repeater.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

33. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Congestion avoidance - Windowing and Buffering
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
Auto - Desirable - and On
Sequence number - Window size - and Acknowledgment number

34. 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?
The interfaces must be configured for NAT.
Congestion avoidance - Windowing and Buffering
To prevent switching loops in networks with redundant switched paths.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

35. Which of the following services use TCP?
802.3ab and 802.3z
In an improperly implemented redundant topology
SMTP FTP and HTTP
The Bridgeg ID and The bridge priority

36. 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?
Sequence number - Window size - and Acknowledgment number
The interfaces must be configured for NAT.
Show arp and Show interface
TCP

37. 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 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.
MAC Address and Bridge Priority
STP
Duplex mismatch

38. 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.
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 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.
Telnet and FTP

39. 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
Auto - Desirable - and On
A hub and A repeater.
In an improperly implemented redundant topology
Show arp and Show interface

40. Which fields are included in the TCP header?
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
Source Port - Acknowledgment Number - and Window
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.

41. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Data link
Encapsulations PPP and authentication CHAP
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 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.

42. 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 network layer
VTP
Fiber optic cable.
Switches increase the number of collision domains in the network.

43. 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?
A cross-over cable
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
This is an Ethernet port operating at half duplex

44. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
VTP
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.
Telnet and FTP

45. Which protocol uses TCP port 443 at layer 4?
HTTPS
STP
Application
VTP

46. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
VTP will allow switches to share VLAN configuration information
Encapsulations PPP and authentication CHAP
STP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

47. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
ARP and ICMP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Network
Serial0/1 is down - line protocol is down

48. Which OSI layer header contains the address of a destination host that is on another network?
An additional broadcast domain will be created.
Port security
Fiber optic cable.
Network

49. 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?
An electrical pulse indicates that the collision has cleared.
The network layer
STP
Switches increase the number of collision domains in the network.

50. 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?
Buffering - Cut-through - and Congestion avoidance
Show arp and Show interface
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