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 protocols below use TCP at the transport layer?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Source Port - Acknowledgment Number - and Window
Fiber optic cable.
SMTP - FTP - HTTP - and HTTPS

2. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
An additional broadcast domain will be created.
SMTP - FTP - HTTP - and HTTPS

3. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
HTTPS - SMTP - and TFTP
Show arp and Show interface
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
It is used to prevent switching loops in networks with redundant switched routes.

4. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
The system is malfunctioning.
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.
Information about a route should never be sent back in the direction from which the original update came.
802.1Q and ISL

5. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
Packet switching - Packet filtering and Internetwork communication.
It is used to prevent switching loops in networks with redundant switched routes.
Configure the switch so that it has a lower priority than other switches in the network.

6. 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?
Switches increase the number of collision domains in the network.
Packet switching - Packet filtering and Internetwork communication.
802.1Q and ISL
Congestion avoidance - Windowing and Buffering

7. 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?
Configure the switch so that it has a lower priority than other switches in the network.
Show cdp neighbor detail
Layer 4
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.

8. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
Duplex mismatch
The network layer
The interfaces must be configured for NAT.

9. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Auto - On - and Desirable
VTP will allow switches to share VLAN configuration information
Duplex mismatch
It is used to prevent switching loops in networks with redundant switched routes.

10. 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?
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
Layer 3
Application

11. 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
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.
To allow remote management of the switch.
Show cdp neighbor detail
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.

12. 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
Application
Path selections and Packet switching.
Auto - Desirable - and On

13. 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?
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.
CertK Switch(config)# ip default-gateway 192.168.1.115
To allow remote management of the switch.
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.

14. Which three of the protocols below belong to the application layer? (Select three answer choices)
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.
HTTPS - SMTP - and TFTP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
In an improperly implemented redundant topology

15. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Application
All switch and bridge ports are in either the forwarding or blocking state.
The sequence number in the TCP header.
Data link

16. What are two characteristics of 'store and forward' switching?
The network layer
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.
Configure the switch so that it has a lower priority than other switches in the network.

17. Which of the following correctly describe the various functions and virtues of a router?
Show arp and Show interface
Increased latency and Filtering of all frame errors
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
Packet switching - Packet filtering and Internetwork communication.

18. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Switches increase the number of collision domains in the network.
Encapsulations PPP and authentication CHAP
An additional broadcast domain will be created.
Auto - On - and Desirable

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 Bridgeg ID and The bridge priority
The switch will forward the frame to a specific port
It is used to prevent switching loops in networks with redundant switched routes.
Decrease the window size.

20. Which of the following are types of flow control?
VLAN and Swtich
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It is the sum of the costs based on bandwidth
Buffering - Cut-through - and Congestion avoidance

21. 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?
100 meters
HTTPS - SMTP - and TFTP
Switches increase the number of collision domains in the network.
HTTPS

22. 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?
Data link
Fiber optic cable.
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 hub and A repeater.

23. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
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 will forward the frame to a specific port
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

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
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.
Fiber optic cable.
Data link
Switches increase the number of collision domains in the network.

25. 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
Sequence number - Window size - and Acknowledgment number
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Network
It will prevent segment 1's broadcasts from getting to segment 2.

26. 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?
Show cdp neighbor detail
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.
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 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.

27. What kind of cable should be used to establish a trunked line between two Catalyst switches?
In an improperly implemented redundant topology
A cross-over cable
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
TCP

28. 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
802.1Q and ISL
Show arp and Show interface
Path selections and Packet switching.
Physical Layer and Datalink Layer

29. 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?
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
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Duplex mismatch
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

30. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
The port is experiencing errors
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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

31. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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 throughout than can half-duplex Ethernet of the same bandwidth
Source Port - Acknowledgment Number - and Window

32. 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?
Layer 3
It is the sum of the costs based on bandwidth
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
This is an Ethernet port operating at half duplex

33. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The network layer
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

34. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
MAC Address and Bridge Priority
It operates without collisions and It provides faster data transfer
Switches increase the number of collision domains in the network.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

35. 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.)
MAC Address and Bridge Priority
HTTPS
It will prevent segment 1's broadcasts from getting to segment 2.
Duplex mismatch

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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Sequence number - Window size - and Acknowledgment number
Information about a route should never be sent back in the direction from which the original update came.
VLAN and Swtich

37. Which of the following services use TCP?
Switches increase the number of collision domains in the network.
Network
SMTP FTP and HTTP
An additional broadcast domain will be created.

38. What is the IEEE standard associated with Gigabit Ethernet?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
All switch and bridge ports are in either the forwarding or blocking state.
MAC Address and Bridge Priority
802.3ab and 802.3z

39. 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.
The Bridgeg ID and The bridge priority
Auto - Desirable - and On
Network
Application

40. 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
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Switches increase the number of collision domains in the network.
Configure the switch so that it has a lower priority than other switches in the network.
The sequence number in the TCP header.

41. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
The network layer
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 cross-over cable
Switches increase the number of collision domains in the network.

42. Which of the following can lead to the contribution of LAN traffic congestion?
100 meters
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Data link
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

43. Which protocol uses TCP port 443 at layer 4?
The network layer
Transport
HTTPS
SMTP - FTP - HTTP - and HTTPS

44. 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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
In an improperly implemented redundant topology
VLAN and Swtich
The network layer

45. 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?
An additional broadcast domain will be created.
Port security
An electrical pulse indicates that the collision has cleared.
Encapsulations PPP and authentication CHAP

46. 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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
VLAN and Swtich
Physical Layer and Datalink Layer
To prevent switching loops in networks with redundant switched paths.

47. 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.
It is the sum of the costs based on 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
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.

48. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
All switch and bridge ports are in either the forwarding or blocking state.
The system is malfunctioning.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

49. 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
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.
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.

50. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
It is the sum of the costs based on bandwidth
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Path selections and Packet switching.
100 meters