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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 statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Serial0/1 is down - line protocol is down
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
VTP
VLAN and Swtich

2. 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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Layer 4
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

3. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
This is an Ethernet port operating at half duplex
Layer 4
MAC Address and Bridge Priority
Duplex mismatch

4. 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?
To prevent switching loops in networks with redundant switched paths.
Configure the switch so that it has a lower priority than other switches in the network.
An additional broadcast domain will be created.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

5. 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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
SMTP - FTP - HTTP - and HTTPS
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

6. 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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7. 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?
Switches increase the number of collision domains in the network.
It operates without collisions and It provides faster data transfer
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
Sequence number - Window size - and Acknowledgment number

8. By default - which of the following factors determines the spanning-tree path cost?
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.
CertK Switch(config)# ip default-gateway 192.168.1.115
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
It is the sum of the costs based on bandwidth

9. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Auto - On - and Desirable
802.3ab and 802.3z
Port security
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

10. Which protocol uses TCP port 443 at layer 4?
To prevent switching loops in networks with redundant switched paths.
Serial0/1 is down - line protocol is down
HTTPS
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

11. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
HTTPS - SMTP - and TFTP
It operates without collisions and It provides faster data transfer

12. 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
Physical Layer and Datalink Layer
Serial0/1 is down - line protocol is down
Application

13. 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
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
VTP will allow switches to share VLAN configuration information
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Show arp and Show interface

14. 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.)
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
MAC Address and Bridge Priority
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.
Switches - Bridges - and Routers

15. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Port security
A cross-over cable
VLAN and Swtich
Layer 4

16. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
802.1Q and ISL
Configure the switch so that it has lower priority than other switches in the network
Source Port - Acknowledgment Number - and Window

17. 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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Duplex mismatch
Data link

18. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
In an improperly implemented redundant topology
ARP and ICMP
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.

19. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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 a lower priority than other switches in the network.
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.

20. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Packet switching - Packet filtering and Internetwork communication.
Auto - On - and Desirable
MAC Address and Bridge Priority
STP

21. Which of the following correctly describe steps in the OSI date encapsulation process?
Encapsulations PPP and authentication CHAP
It will prevent segment 1's broadcasts from getting to segment 2.
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 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.

22. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
To prevent switching loops in networks with redundant switched paths.
Packet switching - Packet filtering and Internetwork communication.
Switches increase the number of collision domains in the network.

23. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
To allow remote management of the 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
Encapsulations PPP and authentication CHAP

24. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
Layer 4
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
To allow remote management of the switch.

25. Which OSI layer header contains the address of a destination host that is on another network?
Buffering - Cut-through - and Congestion avoidance
An electrical pulse indicates that the collision has cleared.
Network
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

26. 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?
Application
The port is experiencing errors
Telnet and FTP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

27. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Information about a route should never be sent back in the direction from which the original update came.
It will prevent segment 1's broadcasts from getting to segment 2.
100 meters
802.3ab and 802.3z

28. 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
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The network layer
It operates without collisions and It provides faster data transfer
Layer 4

29. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
802.1Q and ISL
This is an Ethernet port operating at half duplex
Auto - Desirable - and On

30. 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?
802.3ab and 802.3z
Increased latency and Filtering of all frame errors
An electrical pulse indicates that the collision has cleared.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

31. 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?
The system is malfunctioning.
Show arp and Show interface
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
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.

32. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
Increased latency and Filtering of all frame errors
The port is experiencing errors
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

33. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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
The network layer

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?
The port is experiencing errors
Increased latency and Filtering of all frame errors
Configure the switch so that it has lower priority than other switches in the network
Show arp and Show interface

35. 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?
Encapsulations PPP and authentication CHAP
Increased latency and Filtering of all frame errors
MAC Address and Bridge Priority
802.3ab and 802.3z

36. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Source Port - Acknowledgment Number - and Window
It operates without collisions and It provides faster data transfer
Switches - Bridges - and Routers
Layer 3

37. 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?
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.
Fiber optic cable.
CertK Switch(config)# ip default-gateway 192.168.1.115
HTTPS

38. 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.
Hosts use a logical bus topology
Auto - Desirable - and On
Layer 4

39. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
The network layer
Serial0/1 is down - line protocol is down
In an improperly implemented redundant topology
Data link

40. 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?
802.1Q and ISL
Device Identifiers - Capabilities list - Platform
Information about a route should never be sent back in the direction from which the original update came.
The interfaces must be configured for NAT.

41. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
In an improperly implemented redundant topology
To allow remote management of the switch.
Auto - Desirable - and On
Duplex mismatch

42. What is the IEEE standard associated with Gigabit Ethernet?
Hosts use a logical bus topology
Physical Layer and Datalink Layer
802.3ab and 802.3z
Device Identifiers - Capabilities list - Platform

43. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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
All switch and bridge ports are in either the forwarding or blocking state.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

44. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
Fiber optic cable.
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

45. 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
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.
Sequence number - Window size - and Acknowledgment number
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Duplex mismatch

46. 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?
Learning - Listening - and Forwarding
The port is experiencing errors
The switch will forward the frame to a specific port
Decrease the window size.

47. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Congestion avoidance - Windowing and Buffering
CertK Switch(config)# ip default-gateway 192.168.1.115
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The network layer

48. In a switched LAN network - What is the Spanning-Tree algorithm used for?
CertK Switch(config)# ip default-gateway 192.168.1.115
Auto - On - and Desirable
Sequence number - Window size - and Acknowledgment number
It is used to prevent switching loops in networks with redundant switched routes.

49. 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
Network
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Switches increase the number of collision domains in the network.
A hub and A repeater.

50. 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?
Switches increase the number of collision domains in the network.
Application
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.