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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. 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?
Telnet and FTP
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.
Fiber optic cable.
Configure the switch so that it has lower priority than other switches in the network

2. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Decrease the window size.
Auto - Desirable - and On
Network
A cross-over cable

3. Which fields are included in the TCP header?
The system is malfunctioning.
Source Port - Acknowledgment Number - and Window
Hosts use a logical bus topology
A broadcast address will never be the source address of a frame

4. 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
HTTPS
It will prevent segment 1's broadcasts from getting to segment 2.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

5. 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?
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
An additional broadcast domain will be created.
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.
STP

6. Which OSI layer header contains the address of a destination host that is on another 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.
CertK Switch(config)# ip default-gateway 192.168.1.115
Network
The interfaces must be configured for NAT.

7. 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?
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
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Increased latency and Filtering of all frame errors

8. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Auto - On - and Desirable
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
802.3ab and 802.3z
The Bridgeg ID and The bridge priority

9. 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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Hosts use a logical bus topology
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.

10. 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.
Configure the switch so that it has lower priority than other switches in the network
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

11. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Fiber optic cable.
The Bridgeg ID and The bridge priority
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

12. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
The interfaces must be configured for NAT.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Information about a route should never be sent back in the direction from which the original update came.
It operates without collisions and It provides faster data transfer

13. 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?
Data link
Show arp and Show interface
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The port is experiencing errors

14. 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?
Switches - Bridges - and Routers
Congestion avoidance - Windowing and Buffering
It is used to prevent switching loops in networks with redundant switched routes.
The network layer

15. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Sequence number - Window size - and Acknowledgment number
The network layer
It operates without collisions and It provides faster data transfer
TCP

16. 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?
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
Data link
Sequence number - Window size - and Acknowledgment number
Switches - Bridges - and Routers

17. 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?
Fiber optic cable.
Information about a route should never be sent back in the direction from which the original update came.
Physical Layer and Datalink Layer
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

18. Which two of the following values does STP take into consideration when it elects the root bridge?
The port is experiencing errors
Network
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 Bridgeg ID and The bridge priority

19. 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.
A hub and A repeater.
In an improperly implemented redundant topology
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

20. CDP is running between two CK devices. What information is supplied by CDP?
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
Device Identifiers - Capabilities list - Platform
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.
To prevent switching loops in networks with redundant switched paths.

21. 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?
Configure the switch so that it has lower priority than other switches in the network
CertK Switch(config)# ip default-gateway 192.168.1.115
Network
Congestion avoidance - Windowing and Buffering

22. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
SMTP FTP and HTTP
Show cdp neighbor detail
Buffering - Cut-through - and Congestion avoidance

23. 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?
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.
Learning - Listening - and Forwarding
Device Identifiers - Capabilities list - Platform

24. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
HTTPS
Application
Data link
HTTPS - SMTP - and TFTP

25. Network equipment supporting the use of flow control mechanisms has been recently installed in the CK network. What is the purpose of flow control in a data network?
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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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
Configure the switch so that it has lower priority than other switches in the network

26. Which of the following services use TCP?
Auto - Desirable - and On
Transport
SMTP FTP and HTTP
Learning - Listening - and Forwarding

27. Which three of the protocols below belong to the application layer? (Select three answer choices)
STP
HTTPS - SMTP - and TFTP
The system is malfunctioning.
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.

28. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
The system is malfunctioning.
VTP
Layer 4
The switch will forward the frame to a specific port

29. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Learning - Listening - and Forwarding
In an improperly implemented redundant topology
The interfaces must be configured for NAT.

30. 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?
Port security
Configure the switch so that it has a lower priority than other switches in the network.
Application
Network

31. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Source Port - Acknowledgment Number - and Window
Path selections and Packet switching.
The network layer
Auto - On - and Desirable

32. 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
Buffering - Cut-through - and Congestion avoidance
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The sequence number in the TCP header.
An additional broadcast domain will be created.

33. Which of the following devices can the Certkiller network administrator use to segment the LAN?
An additional broadcast domain will be created.
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.
Switches - Bridges - and Routers
Network

34. 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?
Learning - Listening - and Forwarding
To allow remote management of the switch.
802.3ab and 802.3z
Telnet and FTP

35. The Certkiller corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

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36. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Physical Layer and Datalink Layer
Auto - On - and Desirable
Path selections and Packet switching.
Show arp and Show interface

37. Which of the following are spanning tree port states?
Network
Learning - Listening - and Forwarding
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.
ARP and ICMP

38. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
802.1Q and ISL
Transport
Device Identifiers - Capabilities list - Platform
To prevent switching loops in networks with redundant switched paths.

39. 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 interfaces must be configured for NAT.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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.
Port security

40. 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?
Show cdp neighbor detail
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
Serial0/1 is down - line protocol is down
This is an Ethernet port operating at half duplex

41. What is the IEEE standard associated with Gigabit Ethernet?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
802.3ab and 802.3z
A broadcast address will never be the source address of a frame
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

42. 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?
Certkiller B > trace
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Increased latency and Filtering of all frame errors

43. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Device Identifiers - Capabilities list - Platform
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 Bridgeg ID and The bridge priority
VTP will allow switches to share VLAN configuration information

44. 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?
The sequence number in the TCP header.
Buffering - Cut-through - and Congestion avoidance
Switches increase the number of collision domains in the network.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

45. 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?
HTTPS
All switch and bridge ports are in either the forwarding or blocking state.
100 meters
Hosts use a logical bus topology

46. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Serial0/1 is down - line protocol is down
Auto - Desirable - and On
Auto - On - and Desirable
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

47. Which of the following can lead to the contribution of LAN traffic congestion?
The sequence number in the TCP header.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Too many hosts in a broadcast domain - Broadcast storms and Low 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.

48. 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.
Source Port - Acknowledgment Number - and Window
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
All switch and bridge ports are in either the forwarding or blocking state.

49. 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?
Buffering - Cut-through - and Congestion avoidance
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.
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

50. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
TCP
A cross-over cable