Test your basic knowledge |

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. 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?
A broadcast address will never be the source address of a frame
An additional broadcast domain will be created.
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.
Show cdp neighbor detail

2. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
STP
Auto - Desirable - and On
To prevent switching loops in networks with redundant switched paths.
Path selections and Packet switching.

3. 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 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
TCP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The switch will forward the frame to a specific port

4. 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.
Path selections and Packet switching.
Layer 4
A broadcast address will never be the source address of a frame

5. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Decrease the window size.
The system is malfunctioning.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

6. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
It is used to prevent switching loops in networks with redundant switched routes.
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.
802.1Q and ISL
Information about a route should never be sent back in the direction from which the original update came.

7. 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?
MAC Address and Bridge Priority
Application
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Show arp and Show interface

8. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
Encapsulations PPP and authentication CHAP
Source Port - Acknowledgment Number - and Window
Serial0/1 is down - line protocol is down

9. 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?
Hosts use a logical bus topology
Packet switching - Packet filtering and Internetwork communication.
Physical Layer and Datalink Layer
MAC Address and Bridge Priority

10. 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?
Hosts use a logical bus topology
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
An electrical pulse indicates that the collision has cleared.
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.

11. What is the purpose of the spanning-tree algorithm in a switched LAN?
Buffering - Cut-through - and Congestion avoidance
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
To prevent switching loops in networks with redundant switched paths.
MAC Address and Bridge Priority

12. 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?
Duplex mismatch
Application
Sequence number - Window size - and Acknowledgment number
To allow remote management of the switch.

13. What kind of cable should be used to establish a trunked line between two Catalyst switches?
The network layer
It is the sum of the costs based on bandwidth
Show arp and Show interface
A cross-over cable

14. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
It operates without collisions and It provides faster data transfer
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

15. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
An electrical pulse indicates that the collision has cleared.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A hub and A repeater.
All switch and bridge ports are in either the forwarding or blocking state.

16. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
HTTPS
Switches increase the number of collision domains in the network.
Source Port - Acknowledgment Number - and Window
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.

17. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Data link
An additional broadcast domain will be created.
Device Identifiers - Capabilities list - Platform

18. 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?
Configure the switch so that it has lower priority than other switches in the network
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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The port is experiencing errors

19. 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
This is an Ethernet port operating at half duplex
ARP and ICMP
Congestion avoidance - Windowing and Buffering

20. Which protocol uses TCP port 443 at layer 4?
HTTPS
Physical Layer and Datalink Layer
Buffering - Cut-through - and Congestion avoidance
The interfaces must be configured for NAT.

21. 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?
Sequence number - Window size - and Acknowledgment number
The interfaces must be configured for NAT.
Switches - Bridges - and Routers
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.

22. 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?
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.
VTP will allow switches to share VLAN configuration information
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Network

23. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Congestion avoidance - Windowing and Buffering
Switches increase the number of collision domains in the network.

24. 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
Hosts use a logical bus topology
Data link
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Duplex mismatch

25. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VLAN and Swtich
ARP and ICMP
Increased latency and Filtering of all frame errors

26. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
Packet switching - Packet filtering and Internetwork communication.
CertK Switch(config)# ip default-gateway 192.168.1.115
Fiber optic cable.

27. Which of the following are spanning tree port states?
The network layer
Path selections and Packet switching.
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.
Learning - Listening - and Forwarding

28. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
Encapsulations PPP and authentication CHAP
Show cdp neighbor detail
To allow remote management of the switch.

29. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Data link
In an improperly implemented redundant topology
It is used to prevent switching loops in networks with redundant switched routes.
A broadcast address will never be the source address of a frame

30. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low 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 electrical pulse indicates that the collision has cleared.
Certkiller B > trace

31. 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 network layer
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

32. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It is used to prevent switching loops in networks with redundant switched routes.
SMTP - FTP - HTTP - and HTTPS
Learning - Listening - and Forwarding
It operates without collisions and It provides faster data transfer

33. Although TCP segments are similar to UDP segments - TCP packets contains some additional fields. Which of the following are found in a TCP header - but not in a UDP header?
A broadcast address will never be the source address of a frame
Learning - Listening - and Forwarding
Sequence number - Window size - and Acknowledgment number
Increased latency and Filtering of all frame errors

34. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Certkiller B > trace
To prevent switching loops in networks with redundant switched paths.
A cross-over cable
Auto - On - and Desirable

35. With regard to Ethernet media access methods - which of the following are true?
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.
Switches - Bridges - and Routers
Port security
Decrease the window size.

36. 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?
The network layer
STP
It operates without collisions and It provides faster data transfer
Telnet and FTP

37. 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?
Auto - On - and Desirable
Switches increase the number of collision domains in the network.
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.
Layer 3

38. 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?
SMTP FTP and HTTP
VTP
A cross-over cable
It is used to prevent switching loops in networks with redundant switched routes.

39. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Port security
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Layer 4
The port is experiencing errors

40. 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)
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
HTTPS - SMTP - and TFTP
Configure the switch so that it has lower priority than other switches in the network

41. Which of the protocols below use TCP at the transport layer?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
SMTP - FTP - HTTP - and HTTPS
An electrical pulse indicates that the collision has cleared.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

42. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
The interfaces must be configured for NAT.
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
Duplex mismatch
VTP

43. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
VTP
TCP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

44. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Show arp and Show interface
Sequence number - Window size - and Acknowledgment number
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.

45. 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 Bridgeg ID and The bridge priority
Layer 4
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Certkiller B > trace

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?
The system is malfunctioning.
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.
An additional broadcast domain will be created.
An electrical pulse indicates that the collision has cleared.

47. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
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.
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.
Show arp and Show interface

48. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
CertK Switch(config)# ip default-gateway 192.168.1.115
The network layer
802.1Q and ISL
Transport

49. Which of the following services use TCP?
To prevent switching loops in networks with redundant switched paths.
Show cdp neighbor detail
SMTP FTP and HTTP
ARP and ICMP

50. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
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
100 meters
VTP will allow switches to share VLAN configuration information
SMTP - FTP - HTTP - and HTTPS