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. 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
Data link
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The port is experiencing errors

2. CDP is running between two CK devices. What information is supplied by CDP?
Layer 3
Port security
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Device Identifiers - Capabilities list - Platform

3. 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?
Show cdp neighbor detail
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
STP
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

4. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
802.3ab and 802.3z
Telnet and FTP
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
Path selections and Packet switching.

5. 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.)
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.
MAC Address and Bridge Priority
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
VTP

6. Certkiller is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions - the company needs to make sure that the phone traffic is on a different 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.
VLAN and Swtich
To allow remote management of the switch.

7. 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.
Increased latency and Filtering of all frame errors
VTP will allow switches to share VLAN configuration information
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

8. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Certkiller B > trace
Transport
Switches - Bridges - and Routers
VLAN and Swtich

9. 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?
The network 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.
Learning - Listening - and Forwarding
Packet switching - Packet filtering and Internetwork communication.

10. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
A hub and A repeater.
Switches - Bridges - and Routers
Switches increase the number of collision domains in the network.
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.

11. 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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Layer 4
Show arp and Show interface
100 meters

12. Which of the protocols below use TCP at the transport layer?
An electrical pulse indicates that the collision has cleared.
Serial0/1 is down - line protocol is down
SMTP - FTP - HTTP - and HTTPS
HTTPS

13. 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?
Layer 4
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.
STP
Increased latency and Filtering of all frame errors

14. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Network
802.3ab and 802.3z
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.

15. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Switches increase the number of collision domains in the network.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Congestion avoidance - Windowing and Buffering

16. 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?
Information about a route should never be sent back in the direction from which the original update came.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
A hub and A repeater.
Path selections and Packet switching.

17. 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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Layer 4
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

18. Which protocol uses TCP port 443 at layer 4?
HTTPS
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.
VLAN and Swtich
It will prevent segment 1's broadcasts from getting to segment 2.

19. 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?
Show arp and Show interface
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
Show cdp neighbor detail
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

20. 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?
Path selections and Packet switching.
Source Port - Acknowledgment Number - and Window
Port security
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

21. 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?
The network layer
A broadcast address will never be the source address of a frame
Application
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

22. Which two of the following values does STP take into consideration when it elects the root bridge?
MAC Address and Bridge Priority
Layer 4
It will prevent segment 1's broadcasts from getting to segment 2.
The Bridgeg ID and The bridge priority

23. 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
An additional broadcast domain will be created.
Layer 3
The sequence number in the TCP header.
Telnet and FTP

24. The Certkiller network administrator needs to a switch named CK1 to become the root bridge for a redundant path switched network. What can be done to ensure that CK1 will always assume the role as the root bridge?
It operates without collisions and It provides faster data transfer
Configure the switch so that it has lower priority than other switches in the network
Serial0/1 is down - line protocol is down
It is the sum of the costs based on bandwidth

25. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Packet switching - Packet filtering and Internetwork communication.
Physical Layer and Datalink Layer
Sequence number - Window size - and Acknowledgment number
It is used to prevent switching loops in networks with redundant switched routes.

26. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Switches increase the number of collision domains in the network.
In an improperly implemented redundant topology
The network layer
Layer 3

27. 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?
Path selections and Packet switching.
To allow remote management of the switch.
Network
Certkiller B > trace

28. Which of the following can lead to the contribution of LAN traffic congestion?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
An additional broadcast domain will be created.
Packet switching - Packet filtering and Internetwork communication.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

29. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
It is the sum of the costs based on bandwidth
Auto - Desirable - and On
Learning - Listening - and Forwarding
Show arp and Show interface

30. What are two characteristics of 'store and forward' switching?
Network
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Learning - Listening - and Forwarding
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

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
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.
Configure the switch so that it has lower priority than other switches in the network
Configure the switch so that it has a lower priority than other switches in the network.
The network layer

32. 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?
Congestion avoidance - Windowing and Buffering
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The sequence number in the TCP header.
To allow remote management of the switch.

33. Which of the following are spanning tree port states?
CertK Switch(config)# ip default-gateway 192.168.1.115
Source Port - Acknowledgment Number - and Window
Information about a route should never be sent back in the direction from which the original update came.
Learning - Listening - and Forwarding

34. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
The interfaces must be configured for NAT.
Port security
Serial0/1 is down - line protocol is down
The network layer

35. Which of following VLAN frame encapsulation types are configurable on a Cisco 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.
802.1Q and ISL
Sequence number - Window size - and Acknowledgment number
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

36. 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.
Source Port - Acknowledgment Number - and Window
Application
Network

37. 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?
Telnet and FTP
Switches increase the number of collision domains in the network.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Port security

38. 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?
Buffering - Cut-through - and Congestion avoidance
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.
ARP and ICMP

39. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
Network
MAC Address and Bridge Priority
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

40. As a CCNA candidate - you must know the various layers of the OSI model. At which layers of the OSI model do Wide Area Networks operate in?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Network
Physical Layer and Datalink Layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

41. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
To allow remote management of the switch.
MAC Address and Bridge Priority
Network
Serial0/1 is down - line protocol is down

42. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
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
An electrical pulse indicates that the collision has cleared.
It is the sum of the costs based on bandwidth

43. 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.
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.
ARP and ICMP
Hosts use a logical bus topology

44. Which of the following are true of Ethernet technology?
Switches - Bridges - and Routers
Learning - Listening - and Forwarding
Hosts use a logical bus topology
A hub and A repeater.

45. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Auto - On - and Desirable
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.
Physical Layer and Datalink Layer
A broadcast address will never be the source address of a frame

46. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
It is used to prevent switching loops in networks with redundant switched routes.
100 meters
This is an Ethernet port operating at half duplex

47. 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
Duplex mismatch
An electrical pulse indicates that the collision has cleared.
It will prevent segment 1's broadcasts from getting to segment 2.

48. 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?
Serial0/1 is down - line protocol is down
TCP
Sequence number - Window size - and Acknowledgment number
The port is experiencing errors

49. 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)
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Network
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Learning - Listening - and Forwarding

50. 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?
It operates without collisions and It provides faster data transfer
Application
Duplex mismatch
CertK Switch(config)# ip default-gateway 192.168.1.115