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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. 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?
Switches increase the number of collision domains in the network.
Configure the switch so that it has a lower priority than other switches in the network.
This is an Ethernet port operating at half duplex
It is used to prevent switching loops in networks with redundant switched routes.

2. 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?
Network
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
Port security
VTP

3. 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
It will prevent segment 1's broadcasts from getting to segment 2.
The switch will forward the frame to a specific port
All switch and bridge ports are in either the forwarding or blocking state.

4. What is the purpose of the spanning-tree algorithm in a switched LAN?
Port security
Layer 3
ARP and ICMP
To prevent switching loops in networks with redundant switched paths.

5. 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?
Buffering - Cut-through - and Congestion avoidance
This is an Ethernet port operating at half duplex
To allow remote management of the switch.
Serial0/1 is down - line protocol is down

6. 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?
Switches - Bridges - and Routers
Packet switching - Packet filtering and Internetwork communication.
Telnet and FTP
VTP will allow switches to share VLAN configuration information

7. With regard to Ethernet media access methods - which of the following are true?
To allow remote management of the switch.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Source Port - Acknowledgment Number - and Window
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.

8. Which OSI layer header contains the address of a destination host that is on another network?
Network
Layer 3
An additional broadcast domain will be created.
Hosts use a logical bus topology

9. Which of the following correctly describe the various functions and virtues of a router?
An electrical pulse indicates that the collision has cleared.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
It is the sum of the costs based on bandwidth
Packet switching - Packet filtering and Internetwork communication.

10. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
SMTP FTP and HTTP
802.1Q and ISL
TCP
VTP will allow switches to share VLAN configuration information

11. 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?
Certkiller B > trace
Port security
VTP
This is an Ethernet port operating at half duplex

12. Two buildings on the London campus of a CK corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. CK is concerned about possible problems from voltage potential differences between the two buldings. Which media type shou
Switches increase the number of collision domains 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.
Data link
Fiber optic cable.

13. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Telnet and FTP
VTP

14. 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.
Congestion avoidance - Windowing and Buffering
The network layer
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

15. 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
Serial0/1 is down - line protocol is down
Duplex mismatch
To prevent switching loops in networks with redundant switched paths.
Data link

16. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A broadcast domain with too many hosts - Broadcast storms - and Low 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.
HTTPS
The sequence number in the TCP header.

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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Packet switching - Packet filtering and Internetwork communication.
VLAN and Swtich
Physical Layer and Datalink Layer

18. 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?
Data link
The port is experiencing errors
Network
An additional broadcast domain will be created.

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?
A broadcast address will never be the source address of a frame
Hosts use a logical bus topology
Buffering - Cut-through - and Congestion avoidance
Configure the switch so that it has a lower priority than other switches in the network.

20. 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
Show cdp neighbor detail
Layer 4
To allow remote management of the switch.

21. 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.
Layer 4
Switches increase the number of collision domains in the network.
Certkiller B > trace

22. Which of the following services use TCP?
A broadcast address will never be the source address of a frame
SMTP FTP and HTTP
Data link
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

23. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Show arp and Show interface
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
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

24. 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?
Physical Layer and Datalink Layer
Certkiller B > trace
The switch will forward the frame to a specific port
Data link

25. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
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 broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
All switch and bridge ports are in either the forwarding or blocking state.
Layer 4

26. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Telnet and FTP
STP
HTTPS - SMTP - and TFTP

27. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
802.3ab and 802.3z
A broadcast address will never be the source address of a frame
It will prevent segment 1's broadcasts from getting to segment 2.

28. As a network Admin - you will need to decide on the appropriate network devices to use. Which of the following correctly describes the roles of the devices in a WAN?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Auto - Desirable - and On
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
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.

29. 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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Decrease the window size.
It is used to prevent switching loops in networks with redundant switched routes.

30. Which three of the protocols below belong to the application layer? (Select three answer choices)
Switches increase the number of collision domains in the network.
HTTPS - SMTP - and TFTP
It is used to prevent switching loops in networks with redundant switched routes.
A cross-over cable

31. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Hosts use a logical bus topology
VTP will allow switches to share VLAN configuration information
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

32. 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
It will prevent segment 1's broadcasts from getting to segment 2.
Configure the switch so that it has lower priority than other switches in the network
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

33. Which protocol uses TCP port 443 at layer 4?
HTTPS
The switch will forward the frame to a specific port
Network
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

34. 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?
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
It operates without collisions and It provides faster data transfer
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.
It is the sum of the costs based on bandwidth

35. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
An additional broadcast domain will be created.
The system is malfunctioning.
In an improperly implemented redundant topology
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.

36. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.
VTP

37. Which of the protocols below use TCP at the transport layer?
Data link
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.
Serial0/1 is down - line protocol is down

38. Which fields are included in the TCP header?
100 meters
Show cdp neighbor detail
Source Port - Acknowledgment Number - and Window
The system is malfunctioning.

39. What are two characteristics of 'store and forward' switching?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
ARP and ICMP
Auto - On - and Desirable

40. 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?
Switches - Bridges - and Routers
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
VLAN and Swtich
Show cdp neighbor detail

41. Which of the following are true of Ethernet technology?
Information about a route should never be sent back in the direction from which the original update came.
Hosts use a logical bus topology
Buffering - Cut-through - and Congestion avoidance
VLAN and Swtich

42. In a switched LAN network - What is the Spanning-Tree algorithm used for?
The network 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
It is used to prevent switching loops in networks with redundant switched routes.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

43. 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
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Show arp and Show interface
Learning - Listening - and Forwarding

44. 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?
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
Data link
Sequence number - Window size - and Acknowledgment number
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

45. 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.
Decrease the window size.
100 meters
A hub and A repeater.

46. 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?
Sequence number - Window size - and Acknowledgment number
The port is experiencing errors
TCP
To prevent switching loops in networks with redundant switched paths.

47. 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?
Source Port - Acknowledgment Number - and Window
100 meters
An electrical pulse indicates that the collision has cleared.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

48. 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.)
It operates without collisions and It provides faster data transfer
MAC Address and Bridge Priority
Layer 4
Increased latency and Filtering of all frame errors

49. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
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.
HTTPS
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Transport

50. 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?
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.
VLAN and Swtich
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Congestion avoidance - Windowing and Buffering

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