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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. 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?
Device Identifiers - Capabilities list - Platform
100 meters
Data link
Configure the switch so that it has a lower priority than other switches in the network.

2. 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?
An additional broadcast domain will be created.
VTP will allow switches to share VLAN configuration information
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.
The port is experiencing errors

3. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
Layer 3
Duplex mismatch
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 is the purpose of the spanning-tree algorithm in a switched LAN?
Switches - Bridges - and Routers
This is an Ethernet port operating at half duplex
Data link
To prevent switching loops in networks with redundant switched paths.

5. With regard to Ethernet media access methods - which of the following are true?
Configure the switch so that it has a lower priority than other switches in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Fiber optic 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.

6. 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?
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
The switch will forward the frame to a specific port
Telnet and FTP

7. Which of the following can lead to the contribution of LAN traffic congestion?
Switches increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Data link
Layer 3

8. 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
ARP and ICMP
To allow remote management of the switch.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

9. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Switches increase the number of collision domains in the network.
A broadcast address will never be the source address of a frame
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
TCP

10. 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?
SMTP FTP and HTTP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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

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?
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.
VLAN and Swtich
VTP
Switches increase the number of collision domains in the network.

12. 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?
The network layer
The switch will forward the frame to a specific port
Fiber optic cable.
Configure the switch so that it has a lower priority than other switches in the network.

13. Which of the following correctly describe steps in the OSI date encapsulation process?
Layer 4
Auto - On - and Desirable
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

14. 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
Auto - Desirable - and On
The network layer
Buffering - Cut-through - and Congestion avoidance

15. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
ARP and ICMP
VTP will allow switches to share VLAN configuration information
802.1Q and ISL
Fiber optic cable.

16. 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
CertK Switch(config)# ip default-gateway 192.168.1.115
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
It will prevent segment 1's broadcasts from getting to segment 2.

17. 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?
VTP
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.
Certkiller B > trace
All switch and bridge ports are in either the forwarding or blocking state.

18. Which three of the protocols below belong to the application layer? (Select three answer choices)
A hub and A repeater.
To prevent switching loops in networks with redundant switched paths.
HTTPS - SMTP - and TFTP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

19. Which of the following are true of Ethernet technology?
CertK Switch(config)# ip default-gateway 192.168.1.115
Hosts use a logical bus topology
Duplex mismatch
Source Port - Acknowledgment Number - and Window

20. 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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21. 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?
Learning - Listening - and Forwarding
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 CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

22. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Serial0/1 is down - line protocol is down
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.
Auto - On - and Desirable
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. 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?
Congestion avoidance - Windowing and Buffering
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

24. 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?
Application
Configure the switch so that it has lower priority than other switches in the network
Physical Layer and Datalink Layer
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.

25. 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
VLAN and Swtich
The switch will forward the frame to a specific port
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.
Path selections and Packet switching.

26. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The switch will forward the frame to a specific port
Data link
ARP and ICMP

27. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Layer 4
Congestion avoidance - Windowing and Buffering
Certkiller B > trace
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.

28. Which of the following services use TCP?
Switches increase the number of collision domains in the network.
STP
SMTP FTP and HTTP
The port is experiencing errors

29. 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.
This is an Ethernet port operating at half duplex
VTP will allow switches to share VLAN configuration information
Learning - Listening - and Forwarding

30. Which of the following are types of flow control?
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
Buffering - Cut-through - and Congestion avoidance
Configure the switch so that it has a lower priority than other switches in the network.

31. 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
Information about a route should never be sent back in the direction from which the original update came.
Packet switching - Packet filtering and Internetwork communication.
The sequence number in the TCP header.
HTTPS

32. 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 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
Transport
Switches increase the number of collision domains in the network.
The switch will forward the frame to a specific port

33. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
In an improperly implemented redundant topology
The interfaces must be configured for NAT.
A hub and A repeater.
Duplex mismatch

34. 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
To prevent switching loops in networks with redundant switched paths.
Data link
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.
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

35. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
An electrical pulse indicates that the collision has cleared.
A hub and A repeater.
Increased latency and Filtering of all frame errors
Serial0/1 is down - line protocol is down

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

37. 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.
Physical Layer and Datalink Layer
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Packet switching - Packet filtering and Internetwork communication.
Application

38. 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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
STP

39. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Port security
Encapsulations PPP and authentication CHAP
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 - Bridges - and Routers

40. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
The system is malfunctioning.
Source Port - Acknowledgment Number - and Window
Layer 4
Switches - Bridges - and Routers

41. 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?
To allow remote management of the switch.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
ARP and ICMP
Learning - Listening - and Forwarding

42. Which fields are included in the TCP header?
Switches - Bridges - and Routers
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
Source Port - Acknowledgment Number - and Window

43. 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?
Telnet and FTP
A broadcast address will never be the source address of a frame
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
It is used to prevent switching loops in networks with redundant switched routes.

44. The Certkiller network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?
Congestion avoidance - Windowing and Buffering
Hosts use a logical bus topology
ARP and ICMP
It will prevent segment 1's broadcasts from getting to segment 2.

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
Congestion avoidance - Windowing and Buffering
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
It is the sum of the costs based on bandwidth

46. 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?
Switches increase the number of collision domains in the network.
Application
An additional broadcast domain will be created.
The network layer

47. 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
Show arp and Show interface
Network
Switches increase the number of collision domains in the network.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

48. 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
100 meters
The port is experiencing errors
Sequence number - Window size - and Acknowledgment number
The network layer

49. Which protocol uses TCP port 443 at layer 4?
The Bridgeg ID and The bridge priority
HTTPS
Telnet and FTP
The sequence number in the TCP header.

50. What are two characteristics of 'store and forward' switching?
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.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
All switch and bridge ports are in either the forwarding or blocking state.
Path selections and Packet switching.

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