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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. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Application
SMTP FTP and HTTP
Path selections and Packet switching.
TCP

2. 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.
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 Bridgeg ID and The bridge priority
Hosts use a logical bus topology

3. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
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.
Packet switching - Packet filtering and Internetwork communication.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Transport

4. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Learning - Listening - and Forwarding
802.1Q and ISL
Increased latency and Filtering of all frame errors
Data link

5. Which of the following are spanning tree port states?
CertK Switch(config)# ip default-gateway 192.168.1.115
Data link
Learning - Listening - and Forwarding
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.

6. With regard to Ethernet media access methods - which of the following are true?
VTP will allow switches to share VLAN configuration information
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
SMTP - FTP - HTTP - and HTTPS

7. What kind of cable should be used to establish a trunked line between two Catalyst switches?
It will prevent segment 1's broadcasts from getting to segment 2.
CertK Switch(config)# ip default-gateway 192.168.1.115
A cross-over cable
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. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Port security
STP
It operates without collisions and It provides faster data transfer
Learning - Listening - and Forwarding

9. 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?
Layer 4
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
An electrical pulse indicates that the collision has cleared.
CertK Switch(config)# ip default-gateway 192.168.1.115

10. 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?
ARP and ICMP
Increased latency and Filtering of all frame errors
Buffering - Cut-through - and Congestion avoidance
A hub and A repeater.

11. 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 CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Congestion avoidance - Windowing and Buffering
Transport
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

12. 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
It is used to prevent switching loops in networks with redundant switched routes.
Layer 3
Path selections and Packet switching.

13. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
100 meters
Network

14. What are two characteristics of 'store and forward' switching?
Network
HTTPS
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Data link

15. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It will prevent segment 1's broadcasts from getting to segment 2.
Information about a route should never be sent back in the direction from which the original update came.
It is used to prevent switching loops in networks with redundant switched routes.
It operates without collisions and It provides faster data transfer

16. 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 network layer
Configure the switch so that it has lower priority than other switches in the network
Port security

17. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
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 allow remote management of the switch.
A broadcast address will never be the source address of a frame
Application

18. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The network layer
VTP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

19. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Switches - Bridges - and Routers
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Auto - On - and Desirable
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.

20. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Layer 4
Encapsulations PPP and authentication CHAP
Packet switching - Packet filtering and Internetwork communication.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

21. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Duplex mismatch
Data link
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.

22. A Certkiller Ethernet switch receives a unicast frame with a destination MAC that IS listed in the switch table. What will this switch do with the frame?
HTTPS
To prevent switching loops in networks with redundant switched paths.
The switch will forward the frame to a specific port
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.

23. 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
802.1Q and ISL
An electrical pulse indicates that the collision has cleared.
It operates without collisions and It provides faster data transfer
The network layer

24. 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?
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.
The port is experiencing errors
In an improperly implemented redundant topology

25. 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
Fiber optic cable.
Buffering - Cut-through - and Congestion avoidance
Increased latency and Filtering of all frame errors
The system is malfunctioning.

26. 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
A broadcast domain with too many hosts - 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.
Device Identifiers - Capabilities list - Platform
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

27. 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
Application
To allow remote management of the switch.
Show arp and Show interface
Duplex mismatch

28. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
ARP and ICMP
Device Identifiers - Capabilities list - Platform
Data link
Serial0/1 is down - line protocol is down

29. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Show cdp neighbor detail
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.
A broadcast address will never be the source address of a frame
Switches - Bridges - and Routers

30. 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?
Application
Increased latency and Filtering of all frame errors
Encapsulations PPP and authentication CHAP
100 meters

31. 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.
Hosts use a logical bus topology
It is the sum of the costs based on bandwidth
Congestion avoidance - Windowing and Buffering

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?
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
The Bridgeg ID and The bridge priority
A hub and A repeater.
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.

33. 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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Device Identifiers - Capabilities list - Platform
To prevent switching loops in networks with redundant switched paths.

34. Which of the following correctly describe steps in the OSI date encapsulation process?
To prevent switching loops in networks with redundant switched paths.
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.
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.

35. 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?
Sequence number - Window size - and Acknowledgment number
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
It is used to prevent switching loops in networks with redundant switched routes.
A broadcast address will never be the source address of a frame

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. 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.
Application
This is an Ethernet port operating at half duplex
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

38. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
Auto - Desirable - and On
It operates without collisions and It provides faster data transfer
Port security

39. 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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Show arp and Show interface
Transport

40. 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?
HTTPS - SMTP - and TFTP
To prevent switching loops in networks with redundant switched paths.
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.
Configure the switch so that it has lower priority than other switches in the network

41. 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?
Duplex mismatch
The network layer
Switches increase the number of collision domains in the network.
Hosts use a logical bus topology

42. 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
Physical Layer and Datalink Layer
The switch will forward the frame to a specific port
CertK Switch(config)# ip default-gateway 192.168.1.115

43. 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.
Layer 4
To allow remote management of the switch.
Sequence number - Window size - and Acknowledgment number

44. 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
Network
Layer 4
CertK Switch(config)# ip default-gateway 192.168.1.115

45. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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.
Switches increase the number of collision domains in the network.
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.
Layer 3

46. Which two of the following values does STP take into consideration when it elects the root bridge?
802.3ab and 802.3z
Source Port - Acknowledgment Number - and Window
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The Bridgeg ID and The bridge priority

47. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
CertK Switch(config)# ip default-gateway 192.168.1.115
Show cdp neighbor detail
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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

48. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The switch will forward the frame to a specific port
Path selections and Packet switching.
Layer 4

49. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
Layer 4
Transport
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.

50. Which of the following correctly describe the various functions and virtues of a router?
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 sequence number in the TCP header.
Packet switching - Packet filtering and Internetwork communication.
It is used to prevent switching loops in networks with redundant switched routes.

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