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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. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
A broadcast address will never be the source address of a frame
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.
Data link
Learning - Listening - and Forwarding

2. 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
To prevent switching loops in networks with redundant switched paths.
Show arp and Show interface
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

3. 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?
Sequence number - Window size - and Acknowledgment number
This is an Ethernet port operating at half duplex
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.

4. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Application
HTTPS
All switch and bridge ports are in either the forwarding or blocking state.
Network

5. Which two of the following values does STP take into consideration when it elects the root bridge?
The switch will forward the frame to a specific port
The Bridgeg ID and The bridge priority
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
Show arp and Show interface

6. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
It is used to prevent switching loops in networks with redundant switched routes.
802.1Q and ISL
VTP

7. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
STP
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
Auto - On - and Desirable

8. 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
Path selections and Packet switching.
TCP
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.

9. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
100 meters
To prevent switching loops in networks with redundant switched paths.
VTP
Auto - Desirable - and On

10. Which of the following services use TCP?
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.
Show cdp neighbor detail
100 meters
SMTP FTP and HTTP

11. Which of the following are types of flow control?
Data link
MAC Address and Bridge Priority
Layer 3
Buffering - Cut-through - and Congestion avoidance

12. 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?
Congestion avoidance - Windowing and Buffering
The network layer
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The port is experiencing errors

13. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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.
Switches increase the number of collision domains in the network.
Serial0/1 is down - line protocol is down
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

14. Which of the following correctly describe steps in the OSI date encapsulation process?
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.
Layer 4
All switch and bridge ports are in either the forwarding or blocking state.
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.

15. 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?
ARP and ICMP
Telnet and FTP
Layer 3
It operates without collisions and It provides faster data transfer

16. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
Data link
HTTPS - SMTP - and TFTP
Serial0/1 is down - line protocol is down

17. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Sequence number - Window size - and Acknowledgment number
Switches increase the number of collision domains in the network.
It operates without collisions and It provides faster data transfer
A broadcast address will never be the source address of a frame

18. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
Device Identifiers - Capabilities list - Platform
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

19. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
The system is malfunctioning.
Packet switching - Packet filtering and Internetwork communication.
An additional broadcast domain will be created.

20. 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
Hosts use a logical bus topology
Auto - On - and Desirable
The sequence number in the TCP header.
Information about a route should never be sent back in the direction from which the original update came.

21. 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?
Packet switching - Packet filtering and Internetwork communication.
VLAN and Swtich
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
To allow remote management of the switch.

22. 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?
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
An additional broadcast domain will be created.
Encapsulations PPP and authentication CHAP
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.

23. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
The sequence number in the TCP header.
Network
Layer 3
TCP

24. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
Buffering - Cut-through - and Congestion avoidance
Application
Encapsulations PPP and authentication CHAP

25. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
VLAN and Swtich
CertK Switch(config)# ip default-gateway 192.168.1.115
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

26. 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?
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.
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.
Physical Layer and Datalink Layer
The network layer

27. Certkiller is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions - the company needs to make sure that the phone traffic is on a different network
Configure the switch so that it has lower priority than other switches in the network
VLAN and Swtich
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 3

28. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
SMTP - FTP - HTTP - and HTTPS
Telnet and FTP
Certkiller B > trace
Serial0/1 is down - line protocol is down

29. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Layer 4
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.
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

30. Which protocol uses TCP port 443 at layer 4?
Duplex mismatch
It operates without collisions and It provides faster data transfer
HTTPS
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.

31. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Congestion avoidance - Windowing and Buffering
Decrease the window size.
Application

32. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
To allow remote management of the switch.
Serial0/1 is down - line protocol is down

33. 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
The sequence number in the TCP header.
Switches increase the number of collision domains in the network.
All switch and bridge ports are in either the forwarding or blocking state.
Data link

34. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
802.1Q and ISL
The switch will forward the frame to a specific port
Encapsulations PPP and authentication CHAP
The system is malfunctioning.

35. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
The interfaces must be configured for NAT.
Configure the switch so that it has a lower priority than other switches in the network.
Layer 4

36. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Show arp and Show interface
The Bridgeg ID and The bridge priority
A broadcast address will never be the source address of a frame
Information about a route should never be sent back in the direction from which the original update came.

37. By default - which of the following factors determines the spanning-tree path cost?
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
It is the sum of the costs based on bandwidth
Show cdp neighbor detail
Learning - Listening - and Forwarding

38. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Show cdp neighbor detail
Transport
It operates without collisions and It provides faster data transfer
SMTP - FTP - HTTP - and HTTPS

39. 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?
It operates without collisions and It provides faster data transfer
Port security
This is an Ethernet port operating at half duplex
Packet switching - Packet filtering and Internetwork communication.

40. 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.
Buffering - Cut-through - and Congestion avoidance
SMTP FTP and HTTP
VTP will allow switches to share VLAN configuration information

41. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
A broadcast address will never be the source address of a frame
Auto - On - and Desirable
Duplex mismatch

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.
All switch and bridge ports are in either the forwarding or blocking state.
Application
Packet switching - Packet filtering and Internetwork communication.
TCP

43. 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
Increased latency and Filtering of all frame errors
Switches increase the number of collision domains in the network.
Application

44. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operations?
Application
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Certkiller B > trace
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

45. 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?
100 meters
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The switch will forward the frame to a specific port
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.

46. What kind of cable should be used to establish a trunked line between two Catalyst switches?
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.
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
A cross-over cable
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

47. 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?
Learning - Listening - and Forwarding
Show cdp neighbor detail
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.
Data link

48. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It is used to prevent switching loops in networks with redundant switched routes.
Source Port - Acknowledgment Number - and Window
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Layer 3

49. 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?
Layer 4
Configure the switch so that it has lower priority than other switches in the network
Increased latency and Filtering of all frame errors
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

50. 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
Layer 4
Data link
Application
The network layer

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