Test your basic knowledge |

CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
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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. The Certkiller network administrator wants to use a router named CK1 to segment the local network. What are some of the advantages of using CK1 to segment the network? (Choose two)
Telnet and FTP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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

2. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
STP
The system is malfunctioning.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

3. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Show cdp neighbor detail
STP
Duplex mismatch
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

4. 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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Layer 4
The port is experiencing errors
The sequence number in the TCP header.

5. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Layer 3
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Encapsulations PPP and authentication CHAP

6. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Hosts use a logical bus topology
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Layer 3

7. 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?
Show cdp neighbor detail
HTTPS
Packet switching - Packet filtering and Internetwork communication.
The network layer

8. 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.)
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Transport
HTTPS
MAC Address and Bridge Priority

9. Which of the following services use TCP?
Encapsulations PPP and authentication CHAP
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
SMTP FTP and HTTP
It is used to prevent switching loops in networks with redundant switched routes.

10. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Decrease the window size.
Buffering - Cut-through - and Congestion avoidance
Layer 3

11. 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?
Transport
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
To allow remote management of the switch.
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.

12. 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
HTTPS
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.

13. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Layer 4
Device Identifiers - Capabilities list - Platform
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
Decrease the window size.

14. Which of the following are types of flow control?
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.
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.
Switches increase the number of collision domains in the network.

15. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
VTP
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.

16. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Fiber optic cable.
HTTPS
The port is experiencing errors
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.

17. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Packet switching - Packet filtering and Internetwork communication.
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.

18. 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 receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Switches increase the number of collision domains in the network.
Duplex mismatch
SMTP FTP and HTTP

19. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
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.
Path selections and Packet switching.
The system is malfunctioning.
Transport

20. Why is full-duplex Ethernet superior to its single-duplex counterpart?
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.
Configure the switch so that it has a lower priority than other switches in the network.
It operates without collisions and It provides faster data transfer
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

21. Which three of the protocols below belong to the application layer? (Select three answer choices)
Application
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
HTTPS - SMTP - and TFTP
Network

22. 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?
Telnet and FTP
Switches increase the number of collision domains in the network.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Show arp and Show interface

23. CDP is running between two CK devices. What information is supplied by CDP?
VLAN and Swtich
Device Identifiers - Capabilities list - Platform
HTTPS - SMTP - and TFTP
In an improperly implemented redundant topology

24. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Layer 4
The network layer
Auto - On - and Desirable
Transport

25. Which of the following can lead to the contribution of LAN traffic congestion?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Show cdp neighbor detail
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

26. Which of the following correctly describe steps in the OSI date encapsulation process?
A hub and A repeater.
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.
Show cdp neighbor detail
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

27. Which of the following correctly describe the various functions and virtues of a router?
Certkiller B > trace
Packet switching - Packet filtering and Internetwork communication.
Switches increase the number of collision domains in the network.
Layer 4

28. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
It is the sum of the costs based on bandwidth
Show cdp neighbor detail
Auto - Desirable - and On

29. Which of the protocols below use TCP at the transport layer?
100 meters
It is used to prevent switching loops in networks with redundant switched routes.
Path selections and Packet switching.
SMTP - FTP - HTTP - and HTTPS

30. 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?
Information about a route should never be sent back in the direction from which the original update came.
Congestion avoidance - Windowing and Buffering
Fiber optic cable.
Switches - Bridges - and Routers

31. 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?
HTTPS - SMTP - and TFTP
Increased latency and Filtering of all frame errors
Auto - Desirable - and On
Hosts use a logical bus topology

32. 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?
It is the sum of the costs based on bandwidth
Port security
Telnet and FTP
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.

33. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
SMTP FTP and HTTP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Encapsulations PPP and authentication CHAP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

34. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Packet switching - Packet filtering and Internetwork communication.
Increased latency and Filtering of all frame errors
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

35. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Transport
Switches - Bridges - and Routers
VTP will allow switches to share VLAN configuration information
Information about a route should never be sent back in the direction from which the original update came.

36. 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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37. 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?
Certkiller B > trace
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
Source Port - Acknowledgment Number - and Window

38. 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 broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Device Identifiers - Capabilities list - Platform
Certkiller B > trace
A hub and A repeater.

39. 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 sequence number in the TCP header.
Auto - Desirable - and On
An electrical pulse indicates that the collision has cleared.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

40. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.
TCP
HTTPS

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.
100 meters
Sequence number - Window size - and Acknowledgment number
SMTP - FTP - HTTP - and HTTPS

42. 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
Switches - Bridges - and Routers
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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

43. Which OSI layer header contains the address of a destination host that is on another network?
Network
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Buffering - Cut-through - and Congestion avoidance
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

44. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Duplex mismatch
100 meters
STP

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?
The network layer
802.1Q and ISL
Packet switching - Packet filtering and Internetwork communication.
VTP

46. By default - which of the following factors determines the spanning-tree path cost?
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.
It is the sum of the costs based on bandwidth
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Layer 4

47. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Show arp and Show interface
It is used to prevent switching loops in networks with redundant switched routes.
Fiber optic cable.
Certkiller B > trace

48. 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
Data link
Buffering - Cut-through - and Congestion avoidance
In an improperly implemented redundant topology
Encapsulations PPP and authentication CHAP

49. 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?
Switches increase the number of collision domains 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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Application

50. Which protocol uses TCP port 443 at layer 4?
Encapsulations PPP and authentication CHAP
Network
HTTPS
Buffering - Cut-through - and Congestion avoidance

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