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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. 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?
Certkiller B > trace
Congestion avoidance - Windowing and Buffering
It operates without collisions and It provides faster data transfer
Switches - Bridges - and Routers

2. 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.
Layer 3
Learning - Listening - and Forwarding
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

3. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Increased latency and Filtering of all frame errors
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.
In an improperly implemented redundant topology
STP

4. 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
Auto - Desirable - and On
The network layer
Source Port - Acknowledgment Number - and Window
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

5. In a switched LAN network - What is the Spanning-Tree algorithm used for?
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.
Configure the switch so that it has a lower priority than other switches in the network.
It is used to prevent switching loops in networks with redundant switched routes.

6. 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?
Auto - On - and Desirable
A hub and A repeater.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Device Identifiers - Capabilities list - Platform

7. 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
It will prevent segment 1's broadcasts from getting to segment 2.
Fiber optic cable.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
This is an Ethernet port operating at half duplex

8. 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?
An electrical pulse indicates that the collision has cleared.
The sequence number in the TCP header.
The network layer
This is an Ethernet port operating at half duplex

9. Which of the following devices can the Certkiller network administrator use to segment the LAN?
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
Switches - Bridges - and Routers
Network
HTTPS - SMTP - and TFTP

10. 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?
VLAN and Swtich
VTP will allow switches to share VLAN configuration information
Switches increase the number of collision domains in the network.
Telnet and FTP

11. 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.
Increased latency and Filtering of all frame errors
Application
Network
SMTP - FTP - HTTP - and HTTPS

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?
The network layer
Hosts use a logical bus topology
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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.

13. 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
The Bridgeg ID and The bridge priority
MAC Address and Bridge Priority
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A cross-over cable

14. What is the IEEE standard associated with Gigabit Ethernet?
Data link
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.
802.3ab and 802.3z

15. 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)
Sequence number - Window size - and Acknowledgment number
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Information about a route should never be sent back in the direction from which the original update came.
Physical Layer and Datalink Layer

16. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Packet switching - Packet filtering and Internetwork communication.
Learning - Listening - and Forwarding
To allow remote management of the switch.
Encapsulations PPP and authentication CHAP

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.
802.1Q and ISL
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
STP

18. Which OSI layer header contains the address of a destination host that is on another network?
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
The Bridgeg ID and The bridge priority
Switches increase the number of collision domains in the network.
Network

19. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
STP
HTTPS
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 hub and A repeater.

20. 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 - SMTP - and TFTP
The switch will forward the frame to a specific port
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Congestion avoidance - Windowing and Buffering

21. 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 interfaces must be configured for NAT.
VTP will allow switches to share VLAN configuration information
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.

22. 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
Auto - Desirable - and On
Learning - Listening - and Forwarding
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. What is the purpose of the spanning-tree algorithm in a switched LAN?
Configure the switch so that it has a lower priority than other switches in the network.
To prevent switching loops in networks with redundant switched paths.
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.
Serial0/1 is down - line protocol is down

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?
The port is experiencing errors
Source Port - Acknowledgment Number - and Window
Network
A cross-over cable

25. 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
SMTP - FTP - HTTP - and HTTPS
Encapsulations PPP and authentication CHAP
Layer 4
Duplex mismatch

26. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
Show cdp neighbor detail
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Data link

27. 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 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.
VLAN and Swtich
HTTPS
100 meters

28. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Auto - Desirable - and On
A cross-over cable
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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

29. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
VTP will allow switches to share VLAN configuration information
The switch will forward the frame to a specific port
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.

30. Both bridges are switches are being used throughout the CK LAN. Which of the following statements are true regarding bridges and switches in this network?
Data link
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.
HTTPS - SMTP - and TFTP
Layer 4

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

32. 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 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.
802.3ab and 802.3z
CertK Switch(config)# ip default-gateway 192.168.1.115
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.

33. Which of the following correctly describe the various functions and virtues of a router?
Port security
Packet switching - Packet filtering and Internetwork communication.
Data link
Duplex mismatch

34. 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
Path selections and Packet switching.
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.
Learning - Listening - and Forwarding

35. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Layer 3
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
The Bridgeg ID and The bridge priority
STP

36. 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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Increased latency and Filtering of all frame errors
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
Configure the switch so that it has lower priority than other switches in the network

37. 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?
In an improperly implemented redundant topology
Sequence number - Window size - and Acknowledgment number
Physical Layer and Datalink Layer
Application

38. Which of the protocols below use TCP at the transport layer?
100 meters
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Switches increase the number of collision domains in the network.
SMTP - FTP - HTTP - and HTTPS

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?
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.
Auto - On - and Desirable
Telnet and FTP
A broadcast address will never be the source address of a frame

40. Which of the following are true of Ethernet technology?
Layer 4
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Hosts use a logical bus topology
Source Port - Acknowledgment Number - and Window

41. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Device Identifiers - Capabilities list - Platform
Physical Layer and Datalink Layer
Sequence number - Window size - and Acknowledgment number

42. Which two of the following values does STP take into consideration when it elects the root bridge?
Encapsulations PPP and authentication CHAP
Configure the switch so that it has lower priority than other switches in the network
The Bridgeg ID and The bridge priority
An electrical pulse indicates that the collision has cleared.

43. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
Encapsulations PPP and authentication CHAP
The system is malfunctioning.
Port security

44. 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?
Data link
Auto - Desirable - and On
802.1Q and ISL
VTP

45. 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
Configure the switch so that it has a lower priority than other switches in the network.
STP
Encapsulations PPP and authentication CHAP

46. 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?
Configure the switch so that it has lower priority than other switches in the network
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.
Packet switching - Packet filtering and Internetwork communication.

47. Which of the following can lead to the contribution of LAN traffic congestion?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same 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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
It will prevent segment 1's broadcasts from getting to segment 2.

48. 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 Bridgeg ID and The bridge priority
The sequence number in the TCP header.
Layer 4
STP

49. 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
Encapsulations PPP and authentication CHAP
Data link
The system is malfunctioning.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

50. 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
Encapsulations PPP and authentication CHAP
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
Show arp and Show interface
An electrical pulse indicates that the collision has cleared.

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