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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. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
The network layer
Layer 3
Data link

2. 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
Configure the switch so that it has lower priority than other switches in the network
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The sequence number in the TCP header.
The network layer

3. 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?
An additional broadcast domain will be created.
The switch will forward the frame to a specific port
Port security
CertK Switch(config)# ip default-gateway 192.168.1.115

4. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
100 meters
The system is malfunctioning.
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.

5. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
HTTPS - SMTP - and TFTP
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.
The system is malfunctioning.
All switch and bridge ports are in either the forwarding or blocking state.

6. 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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Application
It will prevent segment 1's broadcasts from getting to segment 2.
The Bridgeg ID and The bridge priority

7. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Encapsulations PPP and authentication CHAP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

8. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched 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.
TCP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

9. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
Path selections and Packet switching.
Packet switching - Packet filtering and Internetwork communication.
ARP and ICMP

10. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It is used to prevent switching loops in networks with redundant switched routes.
MAC Address and Bridge Priority
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Source Port - Acknowledgment Number - and Window

11. 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
Layer 4
Certkiller B > trace
Data link
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

12. 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?
The interfaces must be configured for NAT.
Device Identifiers - Capabilities list - Platform
STP
All switch and bridge ports are in either the forwarding or blocking state.

13. With regard to Ethernet media access methods - which of the following are true?
In an improperly implemented redundant topology
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
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 sequence number in the TCP header.

14. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Sequence number - Window size - and Acknowledgment number
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
Information about a route should never be sent back in the direction from which the original update came.
Switches increase the number of collision domains in the network.

15. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
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.
Layer 4
Switches increase the number of collision domains in the network.
All switch and bridge ports are in either the forwarding or blocking state.

16. 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?
Physical Layer and Datalink Layer
Telnet and FTP
Serial0/1 is down - line protocol is down
Path selections and Packet switching.

17. By default - which of the following factors determines the spanning-tree path cost?
CertK Switch(config)# ip default-gateway 192.168.1.115
Path selections and Packet switching.
It is the sum of the costs based on 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.

18. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The network layer
MAC Address and Bridge Priority
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

19. 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?
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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
100 meters
Congestion avoidance - Windowing and Buffering

20. 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
The Bridgeg ID and The bridge priority
ARP and ICMP
VTP will allow switches to share VLAN configuration information

21. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
MAC Address and Bridge Priority
Configure the switch so that it has a lower priority than other switches in the network.
A broadcast address will never be the source address of a frame

22. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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.
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.
An additional broadcast domain will be created.
A cross-over cable

23. 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?
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.
This is an Ethernet port operating at half duplex
To prevent switching loops in networks with redundant switched paths.
The sequence number in the TCP header.

24. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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
Switches increase the number of collision domains in the network.

25. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
VTP
A broadcast address will never be the source address of a frame
Network
SMTP - FTP - HTTP - and HTTPS

26. 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?
Congestion avoidance - Windowing and Buffering
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

27. 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
VLAN and Swtich
Transport
HTTPS
Duplex mismatch

28. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Transport
The sequence number in the TCP 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
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.

29. 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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30. 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?
Configure the switch so that it has lower priority than other switches in the network
An additional broadcast domain will be created.
Telnet and FTP
The network layer

31. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
Learning - Listening - and Forwarding
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Physical Layer and Datalink Layer

32. 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?
Physical Layer and Datalink Layer
Certkiller B > trace
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
Congestion avoidance - Windowing and Buffering

33. Which of the following correctly describe the various functions and virtues of a router?
The sequence number in the TCP header.
ARP and ICMP
This is an Ethernet port operating at half duplex
Packet switching - Packet filtering and Internetwork communication.

34. 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.
Packet switching - Packet filtering and Internetwork communication.
An electrical pulse indicates that the collision has cleared.
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.

35. Which OSI layer header contains the address of a destination host that is on another network?
Decrease the window size.
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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Network

36. What are two characteristics of 'store and forward' switching?
Decrease the window size.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
HTTPS - SMTP - and TFTP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

37. 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
Telnet and FTP
An electrical pulse indicates that the collision has cleared.
Data link
Show arp and Show interface

38. Which of the following services use TCP?
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP
It will prevent segment 1's broadcasts from getting to segment 2.
Decrease the window size.

39. 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?
Sequence number - Window size - and Acknowledgment number
Increased latency and Filtering of all frame errors
Telnet and FTP
A cross-over cable

40. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Path selections and Packet switching.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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.
Layer 4

41. 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?
Switches increase the number of collision domains in the network.
Sequence number - Window size - and Acknowledgment number
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Source Port - Acknowledgment Number - and Window

42. 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?
The Bridgeg ID and The bridge priority
Data link
The port is experiencing errors
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.

43. 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?
Switches - Bridges - and Routers
Decrease the window size.
Application
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

44. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Layer 4
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Layer 3
The switch will forward the frame to a specific port

45. Which of the following can lead to the contribution of LAN traffic congestion?
HTTPS
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
HTTPS - SMTP - and TFTP
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

46. 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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The network layer
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.

47. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
ARP and ICMP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Fiber optic cable.

48. 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?
100 meters
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
SMTP - FTP - HTTP - and HTTPS
It operates without collisions and It provides faster data transfer

49. 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 is the sum of the costs based on bandwidth
An additional broadcast domain will be created.
The network layer

50. CDP is running between two CK devices. What information is supplied by CDP?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.
Device Identifiers - Capabilities list - Platform
Network