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 commands would be applied to a WAN interface - but not on LAN Interface?
HTTPS
VTP
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.
Encapsulations PPP and authentication CHAP

2. 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?
Physical Layer and Datalink Layer
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Encapsulations PPP and authentication CHAP
Information about a route should never be sent back in the direction from which the original update came.

3. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
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 operates without collisions and It provides faster data transfer
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

4. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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.
Layer 4
A broadcast address will never be the source address of a frame
An additional broadcast domain will be created.

5. 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.
Configure the switch so that it has lower priority than other switches in the network
CertK Switch(config)# ip default-gateway 192.168.1.115
In an improperly implemented redundant topology

6. 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?
Telnet and FTP
HTTPS - SMTP - and TFTP
Encapsulations PPP and authentication CHAP
Configure the switch so that it has a lower priority than other switches in the network.

7. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
This is an Ethernet port operating at half duplex
It operates without collisions and It provides faster data transfer
In an improperly implemented redundant topology
Transport

8. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
CertK Switch(config)# ip default-gateway 192.168.1.115
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Layer 4
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

9. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
The network layer
STP
Layer 4
Device Identifiers - Capabilities list - Platform

10. 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 will forward the frame to a specific port
It will prevent segment 1's broadcasts from getting to segment 2.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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

11. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
The sequence number in the TCP header.
The network layer
TCP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

12. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Buffering - Cut-through - and Congestion avoidance
The sequence number in the TCP header.
802.1Q and ISL
802.3ab and 802.3z

13. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Auto - Desirable - and On
A cross-over cable
Congestion avoidance - Windowing and Buffering

14. 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?
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
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

15. 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
A hub and A repeater.
Auto - Desirable - and On
Encapsulations PPP and authentication CHAP

16. 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
VLAN and Swtich
Increased latency and Filtering of all frame errors
In an improperly implemented redundant topology
802.3ab and 802.3z

17. Which of the following correctly describe steps in the OSI date encapsulation process?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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.
Switches - Bridges - and Routers
TCP

18. Which fields are included in the TCP header?
A broadcast domain with too many hosts - Broadcast storms - and Low 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.
VLAN and Swtich
Source Port - Acknowledgment Number - and Window

19. 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?
Show arp and Show interface
Fiber optic cable.
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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

20. 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
Fiber optic cable.
Sequence number - Window size - and Acknowledgment number
CertK Switch(config)# ip default-gateway 192.168.1.115
Auto - Desirable - and On

21. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
HTTPS - SMTP - and TFTP
In an improperly implemented redundant topology
Layer 3

22. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
Information about a route should never be sent back in the direction from which the original update came.
Physical Layer and Datalink Layer
Telnet and FTP

23. 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.)
Configure the switch so that it has a lower priority than other switches in the network.
SMTP - FTP - HTTP - and HTTPS
MAC Address and Bridge Priority
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.

24. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Packet switching - Packet filtering and Internetwork communication.
Device Identifiers - Capabilities list - Platform
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.

25. Which of the following are true of Ethernet technology?
Duplex mismatch
A cross-over cable
Show cdp neighbor detail
Hosts use a logical bus topology

26. 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 port is experiencing errors
Application
To allow remote management of the switch.
Network

27. 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
100 meters
Duplex mismatch
It is the sum of the costs based on bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

28. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The port is experiencing errors
Serial0/1 is down - line protocol is down

29. In a switched LAN network - What is the Spanning-Tree algorithm used for?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
It is used to prevent switching loops in networks with redundant switched routes.
All switch and bridge ports are in either the forwarding or blocking state.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

30. 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?
In an improperly implemented redundant topology
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.
Hosts use a logical bus topology
An electrical pulse indicates that the collision has cleared.

31. 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
802.1Q and ISL
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Fiber optic cable.
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

32. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Hosts use a logical bus topology
SMTP - FTP - HTTP - and HTTPS
VTP will allow switches to share VLAN configuration information
Data link

33. 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?
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
Application
An additional broadcast domain will be created.
Switches increase the number of collision domains in the network.

34. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Auto - Desirable - and On
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.
VTP will allow switches to share VLAN configuration information
Congestion avoidance - Windowing and Buffering

35. What is the purpose of the spanning-tree algorithm in a switched LAN?
Layer 3
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 will prevent segment 1's broadcasts from getting to segment 2.
To prevent switching loops in networks with redundant switched paths.

36. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
The sequence number in the TCP header.
Data link
A broadcast address will never be the source address of a frame
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

37. 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.
Network
Path selections and Packet switching.
Application

38. 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?
Packet switching - Packet filtering and Internetwork communication.
Telnet and FTP
Show cdp neighbor detail
Layer 3

39. 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?
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.
Application
In an improperly implemented redundant topology
Switches increase the number of collision domains in the network.

40. 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?
Layer 4
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.
Packet switching - Packet filtering and Internetwork communication.
VTP

41. 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?
Buffering - Cut-through - and Congestion avoidance
Application
MAC Address and Bridge Priority
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

42. Which of the following services use TCP?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Application
SMTP FTP and HTTP
Configure the switch so that it has a lower priority than other switches in the network.

43. 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?
Telnet and FTP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
STP
It is used to prevent switching loops in networks with redundant switched routes.

44. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
In an improperly implemented redundant topology
Source Port - Acknowledgment Number - and Window

45. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Application
Network
The sequence number in the TCP header.

46. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
VTP will allow switches to share VLAN configuration information
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 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.

47. You want to upgrade the Certkiller LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?
Switches - Bridges - and Routers
Fiber optic cable.
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 throughput than can half-duplex Ethernet of the same bandwidth

48. What are two characteristics of 'store and forward' switching?
Network
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
This is an Ethernet port operating at half duplex
HTTPS

49. 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?
HTTPS
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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

50. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
SMTP FTP and HTTP
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.
Switches increase the number of collision domains in the network.
Fiber optic cable.