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. 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?
HTTPS
Physical Layer and Datalink Layer
Configure the switch so that it has a lower priority than other switches in the network.
Auto - Desirable - and On

2. 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?
Encapsulations PPP and authentication CHAP
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.
The port is experiencing errors
Device Identifiers - Capabilities list - Platform

3. 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 broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
ARP and ICMP
MAC Address and Bridge Priority
This is an Ethernet port operating at half duplex

4. 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 Bridgeg ID and The bridge priority
To prevent switching loops in networks with redundant switched paths.
An additional broadcast domain will be created.

5. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Switches increase the number of collision domains in the network.
Data link
Port security
802.1Q and ISL

6. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
Transport
Encapsulations PPP and authentication CHAP

7. 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 broadcast address will never be the source address of a frame
The network layer
Auto - On - and Desirable
Port security

8. Which of the following correctly describe the various functions and virtues of a router?
The system is malfunctioning.
Switches - Bridges - and Routers
The port is experiencing errors
Packet switching - Packet filtering and Internetwork communication.

9. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Switches increase the number of collision domains in the network.
SMTP - FTP - HTTP - and HTTPS
A cross-over cable
Layer 3

10. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The interfaces must be configured for NAT.
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.

11. 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 operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Auto - Desirable - and On
A cross-over cable

12. 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
Auto - On - and Desirable
All switch and bridge ports are in either the forwarding or blocking state.
The network layer

13. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Path selections and Packet switching.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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.

14. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
VTP
Layer 3
Serial0/1 is down - line protocol is down
Switches increase the number of collision domains in the network.

15. What is the IEEE standard associated with Gigabit Ethernet?
Layer 4
802.3ab and 802.3z
SMTP - FTP - HTTP - and HTTPS
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.

16. 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
HTTPS - SMTP - and TFTP
Show arp and Show interface
It will prevent segment 1's broadcasts from getting to segment 2.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

17. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
Show arp and Show interface
The sequence number in the TCP header.
STP

18. 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)
The switch will forward the frame to a specific port
802.1Q and ISL
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
VLAN and Swtich

19. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The system is malfunctioning.
Serial0/1 is down - line protocol is down
It is the sum of the costs based on bandwidth

20. With regard to Ethernet media access methods - which of the following are true?
Application
Device Identifiers - Capabilities list - Platform
Transport
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.

21. 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
A broadcast address will never be the source address of a frame
VTP will allow switches to share VLAN configuration information
VLAN and Swtich
VTP

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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Increased latency and Filtering of all frame errors
Configure the switch so that it has lower priority than other switches in the network

23. 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?
Device Identifiers - Capabilities list - Platform
Switches increase the number of collision domains in the network.
The switch will forward the frame to a specific port
Increased latency and Filtering of all frame errors

24. Which of the following services use TCP?
The network layer
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
SMTP FTP and HTTP

25. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
The network layer
Decrease the window size.
Duplex mismatch
Configure the switch so that it has a lower priority than other switches in the network.

26. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
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.
802.1Q and ISL
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. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
Duplex mismatch
It is used to prevent switching loops in networks with redundant switched routes.
The network layer

28. 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?
Duplex mismatch
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Show cdp neighbor detail

29. Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?
VTP will allow switches to share VLAN configuration information
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.
Serial0/1 is down - line protocol is down
Certkiller B > trace

30. Which of the protocols below use TCP at the transport layer?
Packet switching - Packet filtering and Internetwork communication.
SMTP - FTP - HTTP - and HTTPS
This is an Ethernet port operating at half duplex
Decrease the window size.

31. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.

32. 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?
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
To prevent switching loops in networks with redundant switched paths.
The network layer

33. CDP is running between two CK devices. What information is supplied by CDP?
802.3ab and 802.3z
Source Port - Acknowledgment Number - and Window
Device Identifiers - Capabilities list - Platform
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

34. 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?
TCP
Physical Layer and Datalink Layer
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
Configure the switch so that it has lower priority than other switches in the network

35. 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?
Path selections and Packet switching.
The interfaces must be configured for NAT.
Show arp and Show interface
Layer 3

36. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
A hub and A repeater.
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.
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.

37. 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?
The Bridgeg ID and The bridge priority
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
100 meters
Buffering - Cut-through - and Congestion avoidance

38. 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
Duplex mismatch
SMTP FTP and HTTP
The system is malfunctioning.
To allow remote management of the switch.

39. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Telnet and FTP
Transport
Encapsulations PPP and authentication CHAP

40. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
It operates without collisions and It provides faster data transfer
In an improperly implemented redundant topology
HTTPS - SMTP - and TFTP

41. What are two characteristics of 'store and forward' switching?
All switch and bridge ports are in either the forwarding or blocking state.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Telnet and FTP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

42. 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?
VTP
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
Certkiller B > trace
Show arp and Show interface

43. 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
Packet switching - Packet filtering and Internetwork communication.
100 meters
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

44. 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.
Hosts use a logical bus topology
Switches increase the number of collision domains in the network.
A broadcast address will never be the source address of a frame

45. 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?
The network layer
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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.

46. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Auto - On - and Desirable
Transport
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 broadcast address will never be the source address of a frame

47. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
VTP will allow switches to share VLAN configuration information
Duplex mismatch
VTP

48. Which of the following can lead to the contribution of LAN traffic congestion?
VTP
The sequence number in the TCP header.
Network
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

49. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
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
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.
Layer 4

50. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
All switch and bridge ports are in either the forwarding or blocking state.
Application
802.3ab and 802.3z