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 line from the output of the show ip interface command indicates that there is a Layer 1 problem?
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.
MAC Address and Bridge Priority
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.

2. Which of the following services use TCP?
The port is experiencing errors
The system is malfunctioning.
An additional broadcast domain will be created.
SMTP FTP and HTTP

3. Which two of the following values does STP take into consideration when it elects the root bridge?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The Bridgeg ID and The bridge priority
VLAN and Swtich
Switches - Bridges - and Routers

4. 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?
Show cdp neighbor detail
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A hub and A repeater.
Learning - Listening - and Forwarding

5. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
The network layer
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.
VTP
Data link

6. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Device Identifiers - Capabilities list - Platform
The sequence number in the TCP header.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

7. 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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The interfaces must be configured for NAT.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

8. 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?
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.
Decrease the window size.
Layer 4
Port security

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?
Application
In an improperly implemented redundant topology
The network layer
HTTPS - SMTP - and TFTP

10. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Auto - On - and Desirable
The port is experiencing errors
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.
Layer 4

11. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Switches increase the number of collision domains in the network.

12. 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
A hub and A repeater.
It operates without collisions and It provides faster data transfer
HTTPS - SMTP - and TFTP

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?
100 meters
Port security
CertK Switch(config)# ip default-gateway 192.168.1.115
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

14. 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 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
Configure the switch so that it has lower priority than other switches in the network
Auto - Desirable - and On
Data link

15. 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.
Duplex mismatch
Network
Layer 4

16. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
Show arp and Show interface
VLAN and Swtich
Switches increase the number of collision domains in the network.

17. 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.)
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Data link
MAC Address and Bridge Priority
The interfaces must be configured for NAT.

18. 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
VTP will allow switches to share VLAN configuration information
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

19. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Switches - Bridges - and Routers
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
Transport
A cross-over cable

20. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Path selections and Packet switching.
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.
Layer 3

21. 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.
To prevent switching loops in networks with redundant switched paths.
TCP
Port security

22. 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?
It is the sum of the costs based on bandwidth
A hub and A repeater.
It will prevent segment 1's broadcasts from getting to segment 2.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

23. 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
ARP and ICMP
Transport
Physical Layer and Datalink Layer

24. What are two characteristics of 'store and forward' switching?
This is an Ethernet port operating at half duplex
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
All switch and bridge ports are in either the forwarding or blocking state.
STP

25. Which of the following are types of flow control?
Layer 3
Buffering - Cut-through - and Congestion avoidance
VLAN and Swtich
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.

26. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
VLAN and Swtich
Layer 4
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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.

27. 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.
Auto - Desirable - and On
Transport
Information about a route should never be sent back in the direction from which the original update came.

28. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
Path selections and Packet switching.
100 meters
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

29. 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.
The interfaces must be configured for NAT.
Application
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

30. By default - which of the following factors determines the spanning-tree path cost?
Configure the switch so that it has lower priority than other switches in the network
In an improperly implemented redundant topology
It is the sum of the costs based on bandwidth
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.

31. 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 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
The switch will forward the frame to a specific port
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.
Duplex mismatch

32. Which three of the protocols below belong to the application layer? (Select three answer choices)
The interfaces must be configured for NAT.
An additional broadcast domain will be created.
HTTPS - SMTP - and TFTP
Show cdp neighbor detail

33. 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?
Encapsulations PPP and authentication CHAP
This is an Ethernet port operating at half duplex
The switch will forward the frame to a specific port
The port is experiencing errors

34. 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 network layer
VTP
In an improperly implemented redundant topology
Application

35. 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?
SMTP - FTP - HTTP - and HTTPS
STP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Application

36. 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?
Application
ARP and ICMP
The Bridgeg ID and The bridge priority
Congestion avoidance - Windowing and Buffering

37. 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?
Packet switching - Packet filtering and Internetwork communication.
HTTPS - SMTP - and TFTP
VTP
Port security

38. 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
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.
Learning - Listening - and Forwarding

39. 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?
This is an Ethernet port operating at half duplex
Telnet and FTP
100 meters
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

40. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Path selections and Packet switching.
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.
VTP
VTP will allow switches to share VLAN configuration information

41. 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
TCP
The network layer
This is an Ethernet port operating at half duplex
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.

42. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
A broadcast address will never be the source address of a frame
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
HTTPS

43. 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?
STP
An electrical pulse indicates that the collision has cleared.
Network
Switches increase the number of collision domains in the network.

44. 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 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.
VTP will allow switches to share VLAN configuration information
Auto - Desirable - and On

45. Which OSI layer header contains the address of a destination host that is on another network?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Decrease the window size.
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.

46. Which fields are included in the TCP header?
Path selections and Packet switching.
Source Port - Acknowledgment Number - and Window
It operates without collisions and It provides faster data transfer
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

47. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Configure the switch so that it has a lower priority than other switches in the network.
100 meters
802.1Q and ISL

48. 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?
Show arp and Show interface
The port is experiencing errors
Auto - Desirable - and On
An additional broadcast domain will be created.

49. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
802.1Q and ISL
All switch and bridge ports are in either the forwarding or blocking state.
Application
SMTP - FTP - HTTP - and HTTPS

50. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Device Identifiers - Capabilities list - Platform
The sequence number in the TCP header.
Packet switching - Packet filtering and Internetwork communication.