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 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?
SMTP FTP and HTTP
Configure the switch so that it has lower priority than other switches in the network
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

2. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
VTP will allow switches to share VLAN configuration information
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

3. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
To prevent switching loops in networks with redundant switched paths.
Path selections and Packet switching.
Source Port - Acknowledgment Number - and Window
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

4. 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
VTP
The network layer
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

5. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Duplex mismatch
Switches increase the number of collision domains in the network.
STP
TCP

6. 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?
Layer 4
A cross-over cable
Port security
Data link

7. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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
TCP
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.

8. 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.
Port security
Telnet and FTP
The network layer
Application

9. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Layer 4
Auto - Desirable - and On
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.
Data link

10. 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?
Application
In an improperly implemented redundant topology
CertK Switch(config)# ip default-gateway 192.168.1.115
Configure the switch so that it has a lower priority than other switches in the network.

11. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
SMTP FTP and HTTP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The port is experiencing errors
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

12. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
HTTPS
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Switches increase the number of collision domains in the network.
In an improperly implemented redundant topology

13. Which OSI layer header contains the address of a destination host that is on another network?
Network
Encapsulations PPP and authentication CHAP
Duplex mismatch
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

14. 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.
VTP will allow switches to share VLAN configuration information
Auto - On - and Desirable
Layer 3

15. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
An additional broadcast domain will be created.
Sequence number - Window size - and Acknowledgment number
Telnet and FTP

16. 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
It will prevent segment 1's broadcasts from getting to segment 2.
Fiber optic cable.
Switches increase the number of collision domains in the 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.

17. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

18. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Information about a route should never be sent back in the direction from which the original update came.
Network
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 throughout than can half-duplex Ethernet of the same bandwidth

19. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
STP
Congestion avoidance - Windowing and Buffering
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

20. 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?
Path selections and Packet switching.
Data link
Layer 4
The port is experiencing errors

21. 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?
Learning - Listening - and Forwarding
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Hosts use a logical bus topology
Layer 4

22. 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.
Encapsulations PPP and authentication CHAP
The port is experiencing errors
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.

23. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Physical Layer and Datalink Layer
Layer 4

24. 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?
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.
In an improperly implemented redundant topology
Congestion avoidance - Windowing and Buffering
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

25. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
It is the sum of the costs based on bandwidth
802.1Q and ISL
Network
Application

26. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Configure the switch so that it has lower priority than other switches in the network
Auto - On - and Desirable
Packet switching - Packet filtering and Internetwork communication.
Layer 4

27. 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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
An electrical pulse indicates that the collision has cleared.
Switches increase the number of collision domains in the network.

28. Which of the following services use TCP?
SMTP FTP and HTTP
Configure the switch so that it has lower priority than other switches in the network
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

29. 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 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.
Show arp and Show interface
Source Port - Acknowledgment Number - and Window
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

30. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
In an improperly implemented redundant topology
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
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

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

32. 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?
Application
Physical Layer and Datalink Layer
Data link
In an improperly implemented redundant topology

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?
Auto - On - and Desirable
It operates without collisions and It provides faster data transfer
An additional broadcast domain will be created.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

34. What is the IEEE standard associated with Gigabit Ethernet?
SMTP FTP and HTTP
Decrease the window size.
802.3ab and 802.3z
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

35. 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?
Auto - Desirable - and On
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Serial0/1 is down - line protocol is down
The sequence number in the TCP header.

36. 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?
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
Fiber optic cable.
Application

37. 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.
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
Device Identifiers - Capabilities list - Platform
HTTPS

38. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Duplex mismatch
It is used to prevent switching loops in networks with redundant switched routes.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

39. 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
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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The network layer

40. 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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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.
HTTPS

41. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Duplex mismatch
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
802.3ab and 802.3z
Switches increase the number of collision domains in the network.

42. 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?
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 - On - and Desirable
This is an Ethernet port operating at half duplex
The switch will forward the frame to a specific port

43. What are two characteristics of 'store and forward' switching?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
MAC Address and Bridge Priority
Auto - On - and Desirable

44. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Certkiller B > trace
Auto - On - and Desirable
Switches - Bridges - and Routers
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.

45. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
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.
100 meters
In an improperly implemented redundant topology
VTP will allow switches to share VLAN configuration information

46. 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?
Information about a route should never be sent back in the direction from which the original update came.
Switches - Bridges - and Routers
The network layer
Decrease the window size.

47. 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?
The switch will forward the frame to a specific port
The port is experiencing errors
Auto - On - and Desirable
Layer 3

48. Which three of the protocols below belong to the application layer? (Select three answer choices)
The network layer
Switches increase the number of collision domains in the network.
HTTPS - SMTP - and TFTP
802.1Q and ISL

49. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
It operates without collisions and It provides faster data transfer
Auto - Desirable - and On
802.1Q and ISL

50. 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
ARP and ICMP
The network layer
It will prevent segment 1's broadcasts from getting to segment 2.
CertK Switch(config)# ip default-gateway 192.168.1.115