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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. 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?
Network
Auto - Desirable - and On
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.
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.

2. Which of the following are types of flow control?
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.
Layer 4
Buffering - Cut-through - and Congestion avoidance
Increased latency and Filtering of all frame errors

3. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
An additional broadcast domain will be created.
CertK Switch(config)# ip default-gateway 192.168.1.115

4. Which of the following correctly describe the various functions and virtues of a router?
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.
Learning - Listening - and Forwarding
Telnet and FTP
Packet switching - Packet filtering and Internetwork communication.

5. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
VTP will allow switches to share VLAN configuration information
Transport
ARP and ICMP

6. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Sequence number - Window size - and Acknowledgment number
An electrical pulse indicates that the collision has cleared.
STP
HTTPS - SMTP - and TFTP

7. You unsuccessfully try to ping the Internet from the PC host on the LAN. During the troubleshooting process - you enter the 'show ip nat translations' command but the output is blank. What is the most likely cause of the problem?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Application
The interfaces must be configured for NAT.
Source Port - Acknowledgment Number - and Window

8. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
100 meters
Layer 4
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Auto - On - and Desirable

9. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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.
Configure the switch so that it has lower priority than other switches in the network
Transport

10. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Packet switching - Packet filtering and Internetwork communication.
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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Auto - On - and Desirable

11. By default - which of the following factors determines the spanning-tree path cost?
Certkiller B > trace
It is the sum of the costs based on bandwidth
Hosts use a logical bus topology
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

12. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
Layer 3
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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

13. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Transport
Switches increase the number of collision domains in the network.
This is an Ethernet port operating at half duplex
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

14. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
VTP will allow switches to share VLAN configuration information
Physical Layer and Datalink Layer
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.

15. 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
Duplex mismatch
Application
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.

16. 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?
Layer 4
The switch will forward the frame to a specific port
Layer 3
A cross-over cable

17. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
Information about a route should never be sent back in the direction from which the original update came.
Network
Show cdp neighbor detail

18. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
802.3ab and 802.3z
Network
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

19. Which of the following correctly describe steps in the OSI date encapsulation process?
HTTPS
TCP
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

20. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
The switch will forward the frame to a specific port
Application
In an improperly implemented redundant topology
All switch and bridge ports are in either the forwarding or blocking state.

21. 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 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.
The Bridgeg ID and The bridge priority
Device Identifiers - Capabilities list - Platform
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

22. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
VLAN and Swtich
Layer 3
Telnet and FTP

23. Which of the following can lead to the contribution of LAN traffic congestion?
The Bridgeg ID and The bridge priority
Device Identifiers - Capabilities list - Platform
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Telnet and FTP

24. 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
Layer 4
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.
The switch will forward the frame to a specific port

25. 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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
A broadcast address will never be the source address of a frame
Transport

26. 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?
Duplex mismatch
Buffering - Cut-through - and Congestion avoidance
Congestion avoidance - Windowing and Buffering
Port security

27. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
To allow remote management of the switch.
Buffering - Cut-through - and Congestion avoidance
Port security
VTP will allow switches to share VLAN configuration information

28. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
To prevent switching loops in networks with redundant switched paths.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Information about a route should never be sent back in the direction from which the original update came.
Layer 4

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.
In an improperly implemented redundant topology
This is an Ethernet port operating at half duplex
A broadcast address will never be the source address of a frame

30. 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?
Application
Telnet and FTP
Show arp and Show interface
The network layer

31. 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.
Telnet and FTP
Show cdp neighbor detail
Application

32. 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
SMTP FTP and HTTP
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.
A hub and A repeater.

33. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Port security
The system is malfunctioning.
All switch and bridge ports are in either the forwarding or blocking state.
Switches - Bridges - and Routers

34. 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)
Encapsulations PPP and authentication CHAP
In an improperly implemented redundant topology
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Packet switching - Packet filtering and Internetwork communication.

35. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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.
Configure the switch so that it has lower priority than other switches in the network

36. Which protocol uses TCP port 443 at layer 4?
HTTPS
Application
Transport
Data link

37. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Port security
Application
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
It operates without collisions and It provides faster data transfer

38. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
Switches increase the number of collision domains in the network.
Network
Data link

39. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
STP
It will prevent segment 1's broadcasts from getting to segment 2.
Auto - Desirable - and On
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

40. What are two characteristics of 'store and forward' switching?
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.
Device Identifiers - Capabilities list - Platform
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

41. A host computer has been correctly configured with a static IP address - but the default gateway is incorrectly set. Which layer of the OSI model will be first effected by this configuration error?
Congestion avoidance - Windowing and Buffering
VTP
Encapsulations PPP and authentication CHAP
Layer 3

42. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Auto - Desirable - and On
CertK Switch(config)# ip default-gateway 192.168.1.115
100 meters

43. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on 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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Network
The system is malfunctioning.

44. 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?
VLAN and Swtich
An additional broadcast domain will be created.
An electrical pulse indicates that the collision has cleared.
100 meters

45. Which two of the following values does STP take into consideration when it elects the root bridge?
Congestion avoidance - Windowing and Buffering
A cross-over cable
The Bridgeg ID and The bridge priority
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

46. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
The network layer
Information about a route should never be sent back in the direction from which the original update came.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
VTP will allow switches to share VLAN configuration information

47. 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?
Serial0/1 is down - line protocol is down
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.
The port is experiencing errors

48. 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?
Data link
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
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.

49. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
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.
Duplex mismatch
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Buffering - Cut-through - and Congestion avoidance

50. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Layer 3
Configure the switch so that it has a lower priority than other switches in the network.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Fiber optic cable.