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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VLAN and Swtich
Path selections and Packet switching.
Show arp and Show interface
VTP will allow switches to share VLAN configuration information

2. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
Sequence number - Window size - and Acknowledgment number
802.3ab and 802.3z
SMTP FTP and HTTP

3. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
HTTPS - SMTP - and TFTP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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

4. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Auto - On - and Desirable
Congestion avoidance - Windowing and Buffering
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
It is used to prevent switching loops in networks with redundant switched routes.

5. 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
Encapsulations PPP and authentication CHAP
The system is malfunctioning.
Application
Duplex mismatch

6. Which of the following devices can the Certkiller network administrator use to segment the LAN?
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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Switches - Bridges - and Routers
The Bridgeg ID and The bridge priority

7. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
TCP
802.3ab and 802.3z

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?
Device Identifiers - Capabilities list - Platform
Congestion avoidance - Windowing and Buffering
Layer 4
Information about a route should never be sent back in the direction from which the original update came.

9. 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
Physical Layer and Datalink Layer
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
To allow remote management of the switch.
It is used to prevent switching loops in networks with redundant switched routes.

10. 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?
MAC Address and Bridge Priority
STP
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
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.

11. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
To prevent switching loops in networks with redundant switched paths.
Layer 4
An additional broadcast domain will be created.
STP

12. 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.
The system is malfunctioning.
Configure the switch so that it has lower priority than other switches in the network
Certkiller B > trace

13. 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 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
Configure the switch so that it has a lower priority than other switches in the network.
Sequence number - Window size - and Acknowledgment number

14. By default - which of the following factors determines the spanning-tree path cost?
802.3ab and 802.3z
In an improperly implemented redundant topology
It is the sum of the costs based on bandwidth
To prevent switching loops in networks with redundant switched paths.

15. 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.
The network layer
SMTP - FTP - HTTP - and HTTPS
Application
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.

16. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Telnet and FTP
HTTPS
The interfaces must be configured for NAT.
Layer 4

17. Which protocol uses TCP port 443 at layer 4?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
HTTPS
SMTP - FTP - HTTP - and HTTPS
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

18. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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 - SMTP - and TFTP

19. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Layer 4
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Physical Layer and Datalink Layer
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

20. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
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.
Switches increase the number of collision domains in the network.
Congestion avoidance - Windowing and Buffering

21. 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?
Information about a route should never be sent back in the direction from which the original update came.
The switch will forward the frame to a specific port
100 meters
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.

22. 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?
Physical Layer and Datalink Layer
Source Port - Acknowledgment Number - and Window
VTP
ARP and ICMP

23. 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
Physical Layer and Datalink Layer
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Buffering - Cut-through - and Congestion avoidance
Data link

24. 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
Congestion avoidance - Windowing and Buffering
The network layer
Auto - On - and Desirable
The Bridgeg ID and The bridge priority

25. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
802.1Q and ISL
Port security
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
MAC Address and Bridge Priority

26. 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?
Decrease the window size.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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

27. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
The network layer
STP
Encapsulations PPP and authentication CHAP
Increased latency and Filtering of all frame errors

28. 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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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
Decrease the window size.
Physical Layer and Datalink Layer

29. 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?
Switches increase the number of collision domains in the network.
It is used to prevent switching loops in networks with redundant switched routes.
To allow remote management of the switch.
An electrical pulse indicates that the collision has cleared.

30. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Configure the switch so that it has lower priority than other switches in the network
The network layer
It operates without collisions and It provides faster data transfer
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

31. What is the IEEE standard associated with Gigabit Ethernet?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Certkiller B > trace
Hosts use a logical bus topology
802.3ab and 802.3z

32. 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?
The network layer
Switches - Bridges - and Routers
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
A cross-over cable

33. 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?
Application
802.1Q and ISL
Configure the switch so that it has a lower priority than other switches in the network.
Show cdp neighbor detail

34. 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?
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.
Decrease the window size.
Port security
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

35. Which of the following services use TCP?
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.
SMTP FTP and HTTP
HTTPS
To prevent switching loops in networks with redundant switched paths.

36. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
VLAN and Swtich
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.
Switches increase the number of collision domains in the network.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

37. 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.
Physical Layer and Datalink Layer
Packet switching - Packet filtering and Internetwork communication.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

38. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
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.
Fiber optic cable.
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.

39. 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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Decrease the window size.
VLAN and Swtich
100 meters

40. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
TCP
Switches increase the number of collision domains in the network.
Hosts use a logical bus topology
Show cdp neighbor detail

41. 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?
Source Port - Acknowledgment Number - and Window
Telnet and FTP
Buffering - Cut-through - and Congestion avoidance
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.

42. 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?
Show cdp neighbor detail
802.1Q and ISL
To allow remote management of the switch.
Layer 3

43. 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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44. What is the purpose of the spanning-tree algorithm in a switched LAN?
Increased latency and Filtering of all frame errors
SMTP FTP and HTTP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
To prevent switching loops in networks with redundant switched paths.

45. 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?
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.
It is the sum of the costs based on bandwidth
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
An additional broadcast domain will be created.

46. Which two of the following values does STP take into consideration when it elects the root bridge?
VLAN and Swtich
It operates without collisions and It provides faster data transfer
Switches increase the number of collision domains in the network.
The Bridgeg ID and The bridge priority

47. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Serial0/1 is down - line protocol is down
All switch and bridge ports are in either the forwarding or blocking state.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Physical Layer and Datalink Layer

48. Which of the following correctly describe steps in the OSI date encapsulation process?
Configure the switch so that it has a lower priority than other switches in the network.
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.
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.
Application

49. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Increased latency and Filtering of all frame errors
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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

50. 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
Data link
This is an Ethernet port operating at half duplex