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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 being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Auto - On - and Desirable
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.
Transport
Device Identifiers - Capabilities list - Platform

2. 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?
Congestion avoidance - Windowing and Buffering
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
MAC Address and Bridge Priority
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

3. 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.
Increased latency and Filtering of all frame errors
HTTPS - SMTP - and TFTP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

4. Which fields are included in the TCP header?
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.
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.
Source Port - Acknowledgment Number - and Window
This is an Ethernet port operating at half duplex

5. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
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.
CertK Switch(config)# ip default-gateway 192.168.1.115
VTP will allow switches to share VLAN configuration information
The system is malfunctioning.

6. 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
Buffering - Cut-through - and Congestion avoidance
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.
It operates without collisions and It provides faster data transfer
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

7. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
MAC Address and Bridge Priority
Fiber optic cable.
Decrease the window size.

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.
Application
SMTP - FTP - HTTP - and HTTPS
Switches - Bridges - and Routers
Increased latency and Filtering of all frame errors

9. You need to perform some initial configuration tasks on a new Certkiller switch. What is the purpose of assigning an IP address to a switch?
100 meters
To allow remote management of the switch.
It is the sum of the costs based on bandwidth
Hosts use a logical bus topology

10. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Buffering - Cut-through - and Congestion avoidance
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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

11. 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.)
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
This is an Ethernet port operating at half duplex
MAC Address and Bridge Priority
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.

12. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
It is the sum of the costs based on bandwidth
It operates without collisions and It provides faster data transfer
100 meters
Layer 4

13. 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?
ARP and ICMP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Physical Layer and Datalink Layer
VTP

14. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
STP
ARP and ICMP
Path selections and Packet switching.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

15. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
A broadcast address will never be the source address of a frame
TCP
Layer 4
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. 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?
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 network layer
An electrical pulse indicates that the collision has cleared.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

17. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
VLAN and Swtich

18. 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?
Port security
An electrical pulse indicates that the collision has cleared.
Fiber optic cable.
SMTP FTP and HTTP

19. 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
Packet switching - Packet filtering and Internetwork communication.
Encapsulations PPP and authentication CHAP
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

20. 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?
To prevent switching loops in networks with redundant switched paths.
All switch and bridge ports are in either the forwarding or blocking state.
Sequence number - Window size - and Acknowledgment number
Switches - Bridges - and Routers

21. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
HTTPS
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.
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

22. 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?
It is used to prevent switching loops in networks with redundant switched routes.
It will prevent segment 1's broadcasts from getting to segment 2.
Switches increase the number of collision domains in the network.
A hub and A repeater.

23. Which of the following are spanning tree port states?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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
Certkiller B > trace

24. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
It is the sum of the costs based on bandwidth
Packet switching - Packet filtering and Internetwork communication.
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

25. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
It will prevent segment 1's broadcasts from getting to segment 2.
All switch and bridge ports are in either the forwarding or blocking state.
802.3ab and 802.3z
Layer 3

26. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Serial0/1 is down - line protocol is down
To allow remote management of the switch.
STP
HTTPS

27. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
To prevent switching loops in networks with redundant switched paths.
Data link
In an improperly implemented redundant topology

28. 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.
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.
Network
ARP and ICMP

29. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
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.
Telnet and FTP
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.

30. 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.
A broadcast address will never be the source address of a frame
A broadcast domain with too many hosts - Broadcast storms - and Low 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

31. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
The sequence number in the TCP header.
To prevent switching loops in networks with redundant switched paths.
This is an Ethernet port operating at half duplex
Encapsulations PPP and authentication CHAP

32. 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
Telnet and FTP
To allow remote management of the switch.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

33. 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?
Auto - Desirable - and On
The port is experiencing errors
SMTP FTP and HTTP
Certkiller B > trace

34. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Duplex mismatch
Transport
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 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.

35. 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
The sequence number in the TCP header.
Decrease the window size.
Auto - Desirable - and On
To allow remote management of the switch.

36. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
The sequence number in the TCP header.
HTTPS - SMTP - and TFTP
VTP will allow switches to share VLAN configuration information
Auto - On - and Desirable

37. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Hosts use a logical bus topology
An electrical pulse indicates that the collision has cleared.
Auto - Desirable - and On
Auto - On - and Desirable

38. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
To prevent switching loops in networks with redundant switched paths.
It is used to prevent switching loops in networks with redundant switched routes.
Port security

39. 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.
Encapsulations PPP and authentication CHAP
Hosts use a logical bus topology
Layer 4

40. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
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.
100 meters
Network
The network layer

41. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
SMTP - FTP - HTTP - and HTTPS
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.
Buffering - Cut-through - and Congestion avoidance
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.

42. 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
802.1Q and ISL
Auto - On - and Desirable
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.
Data link

43. 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
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.
The Bridgeg ID and The bridge priority
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

44. 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?
A cross-over cable
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Auto - Desirable - and On
Layer 3

45. 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?
Layer 4
The network layer
An additional broadcast domain will be created.
The switch will forward the frame to a specific port

46. 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?
Source Port - Acknowledgment Number - and Window
VTP
Show cdp neighbor detail
Auto - Desirable - and On

47. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Switches increase the number of collision domains in the network.
Transport
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.
Data link

48. 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?
In an improperly implemented redundant topology
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Configure the switch so that it has a lower priority than other switches in 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.

49. Which of the following are true of Ethernet technology?
An additional broadcast domain will be created.
Sequence number - Window size - and Acknowledgment number
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
Hosts use a logical bus topology

50. In a switched LAN network - What is the Spanning-Tree algorithm used for?
In an improperly implemented redundant topology
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
An additional broadcast domain will be created.
It is used to prevent switching loops in networks with redundant switched routes.