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. CDP is running between two CK devices. What information is supplied by CDP?
802.3ab and 802.3z
Encapsulations PPP and authentication CHAP
The system is malfunctioning.
Device Identifiers - Capabilities list - Platform

2. Which of the following correctly describe steps in the OSI date encapsulation process?
Network
Network
100 meters
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.

3. 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?
Switches increase the number of collision domains in the network.
The interfaces must be configured for NAT.
Layer 4
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

4. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
CertK Switch(config)# ip default-gateway 192.168.1.115
The interfaces must be configured for NAT.
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

5. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Show arp and Show interface
STP
Path selections and Packet switching.
The Bridgeg ID and The bridge priority

6. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
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
All switch and bridge ports are in either the forwarding or blocking state.
Network
MAC Address and Bridge Priority

7. 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?
To prevent switching loops in networks with redundant switched paths.
Switches increase the number of collision domains in the network.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Congestion avoidance - Windowing and Buffering

8. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Congestion avoidance - Windowing and Buffering
Encapsulations PPP and authentication CHAP
Data link
MAC Address and Bridge Priority

9. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Switches increase the number of collision domains in the network.
It is used to prevent switching loops in networks with redundant switched routes.
Network
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

10. 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?
MAC Address and Bridge Priority
It operates without collisions and It provides faster data transfer
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The network layer

11. 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?
VTP
An electrical pulse indicates that the collision has cleared.
Layer 3
SMTP - FTP - HTTP - and HTTPS

12. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
It operates without collisions and It provides faster data transfer
The switch will forward the frame to a specific port
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.

13. Which of the following services use TCP?
Information about a route should never be sent back in the direction from which the original update came.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
802.1Q and ISL
SMTP FTP and HTTP

14. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Packet switching - Packet filtering and Internetwork communication.
Application
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.

15. Which OSI layer header contains the address of a destination host that is on another network?
Switches increase the number of collision domains in the network.
Network
To allow remote management of the switch.
Layer 4

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

17. 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.
Duplex mismatch
Sequence number - Window size - and Acknowledgment number
CertK Switch(config)# ip default-gateway 192.168.1.115

18. 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?
Encapsulations PPP and authentication CHAP
Device Identifiers - Capabilities list - Platform
Layer 4
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

19. Which fields are included in the TCP header?
VTP
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 Bridgeg ID and The bridge priority
Source Port - Acknowledgment Number - and Window

20. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
HTTPS

21. Some of the older Certkiller switches store the entire frame before forwarding it to the destination. What are two effects on network performance of configuring a switch to do this?
It is the sum of the costs based on bandwidth
Network
This is an Ethernet port operating at half duplex
Increased latency and Filtering of all frame errors

22. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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

23. 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?
An electrical pulse indicates that the collision has cleared.
Information about a route should never be sent back in the direction from which the original update came.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
SMTP - FTP - HTTP - and HTTPS

24. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Port security
Auto - Desirable - and On
VLAN and Swtich

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?
Physical Layer and Datalink Layer
Decrease the window size.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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

26. 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
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Fiber optic cable.

27. 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?
A cross-over cable
ARP and ICMP
Path selections and Packet switching.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

28. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
Data link
Device Identifiers - Capabilities list - Platform
This is an Ethernet port operating at half duplex

29. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
An additional broadcast domain will be created.
Application
Show cdp neighbor detail
Switches increase the number of collision domains in the network.

30. Which of the following are true of Ethernet technology?
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.
Hosts use a logical bus topology
Buffering - Cut-through - and Congestion avoidance
HTTPS

31. Which of the following correctly describe the various functions and virtues of a 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.
Packet switching - Packet filtering and Internetwork communication.
To allow remote management of the switch.
SMTP FTP and HTTP

32. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Encapsulations PPP and authentication CHAP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Physical Layer and Datalink Layer

33. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
An additional broadcast domain will be created.
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Sequence number - Window size - and Acknowledgment number

34. 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?
This is an Ethernet port operating at half duplex
To allow remote management of the switch.
Serial0/1 is down - line protocol is down
VTP

35. 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
The network layer
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
Show cdp neighbor detail
TCP

36. 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?
Application
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
STP
SMTP FTP and HTTP

37. 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?
Data link
Show cdp neighbor detail
Configure the switch so that it has lower priority than other switches in the network
A cross-over cable

38. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Hosts use a logical bus topology
To prevent switching loops in networks with redundant switched paths.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Source Port - Acknowledgment Number - and Window

39. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Information about a route should never be sent back in the direction from which the original update came.

40. 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
Path selections and Packet switching.
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.
802.1Q and ISL

41. 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
Auto - On - and Desirable
VLAN and Swtich
This is an Ethernet port operating at half duplex
It will prevent segment 1's broadcasts from getting to segment 2.

42. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Data link
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 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
It operates without collisions and It provides faster data transfer

43. 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
An electrical pulse indicates that the collision has cleared.
Auto - On - and Desirable
The Bridgeg ID and The bridge priority

44. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
The sequence number in the TCP header.
802.1Q and ISL
Switches - Bridges - and Routers
Decrease the window size.

45. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
Serial0/1 is down - line protocol is down
The network layer
Source Port - Acknowledgment Number - and Window

46. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
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.
802.1Q and ISL
Auto - Desirable - and On
Path selections and Packet switching.

47. 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
Show arp and Show interface
Telnet and FTP
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

48. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
Auto - Desirable - and On
Increased latency and Filtering of all frame errors
Layer 4

49. 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?
HTTPS
The port is experiencing errors
Layer 4
The network layer

50. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
The port is experiencing errors
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Data link
Layer 4