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. 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
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
Buffering - Cut-through - and Congestion avoidance
The network layer

2. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
802.3ab and 802.3z
HTTPS - SMTP - and TFTP
Physical Layer and Datalink Layer

3. 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?
Encapsulations PPP and authentication CHAP
The port is experiencing errors
Telnet and FTP
A hub and A repeater.

4. 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 sequence number in the TCP header.
STP
Layer 3
An additional broadcast domain will be created.

5. 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?
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.
Sequence number - Window size - and Acknowledgment number
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

6. 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?
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Application
To allow remote management of the switch.

7. Which three of the protocols below belong to the application layer? (Select three answer choices)
Device Identifiers - Capabilities list - Platform
HTTPS - SMTP - and TFTP
The port is experiencing errors
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

8. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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.
HTTPS - SMTP - and TFTP

9. Which fields are included in the TCP header?
Device Identifiers - Capabilities list - Platform
It is used to prevent switching loops in networks with redundant switched routes.
Source Port - Acknowledgment Number - and Window
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

10. Which of the following are spanning tree port states?
SMTP FTP and HTTP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Learning - Listening - and Forwarding
It operates without collisions and It provides faster data transfer

11. 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.
Application
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Layer 3
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

12. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Network
This is an Ethernet port operating at half duplex
Physical Layer and Datalink Layer

13. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
It operates without collisions and It provides faster data transfer
Auto - On - and Desirable
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

14. 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?
The switch will forward the frame to a specific port
Show arp and Show interface
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.
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.

15. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in 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.
It operates without collisions and It provides faster data transfer
Layer 4
Network

16. While troubleshooting an issue in the Certkiller LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement - What is known about the network interface port?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
This is an Ethernet port operating at half duplex
Configure the switch so that it has a lower priority than other switches in the network.
ARP and ICMP

17. By default - which of the following factors determines the spanning-tree path cost?
TCP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
It is the sum of the costs based on bandwidth
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

18. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
The network layer
Port security
Configure the switch so that it has lower priority than other switches in the network
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

19. The LAN needs are expanding at the CK corporate office - which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the CK network. Which of the following are layer 1 devices that you can use?
802.1Q and ISL
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
A hub and A repeater.
Auto - Desirable - and On

20. Which of the following can lead to the contribution of LAN traffic congestion?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
To allow remote management of the switch.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

21. Two buildings on the London campus of a CK corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. CK is concerned about possible problems from voltage potential differences between the two buldings. Which media type shou
Fiber optic cable.
Sequence number - Window size - and Acknowledgment number
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
A cross-over cable

22. 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?
Physical Layer and Datalink Layer
Decrease the window size.
Certkiller B > trace
Encapsulations PPP and authentication CHAP

23. 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
Show cdp neighbor detail
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
A cross-over cable

24. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
In an improperly implemented redundant topology
Path selections and Packet switching.
Auto - Desirable - and On
The system is malfunctioning.

25. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Path selections and Packet switching.

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?
Configure the switch so that it has lower priority than other switches in the network
VTP
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
The port is experiencing errors

27. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Configure the switch so that it has lower priority than other switches in the network
Transport
Auto - On - and Desirable
All switch and bridge ports are in either the forwarding or blocking state.

28. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
It is the sum of the costs based on bandwidth
802.1Q and ISL
An electrical pulse indicates that the collision has cleared.
Congestion avoidance - Windowing and Buffering

29. 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?
VTP
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.
Network

30. 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?
Configure the switch so that it has lower priority than other switches in the network
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
It is used to prevent switching loops in networks with redundant switched routes.
TCP

31. Which two of the following values does STP take into consideration when it elects the root bridge?
Sequence number - Window size - and Acknowledgment number
Switches - Bridges - and Routers
The Bridgeg ID and The bridge priority
Show arp and Show interface

32. What are two characteristics of 'store and forward' switching?
SMTP FTP and HTTP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Data link
STP

33. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
The interfaces must be configured for NAT.
All switch and bridge ports are in either the forwarding or blocking state.
Switches increase the number of collision domains in the network.

34. What kind of cable should be used to establish a trunked line between two Catalyst switches?
The sequence number in the TCP header.
Encapsulations PPP and authentication CHAP
A cross-over cable
Telnet and FTP

35. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Network

36. 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?
Data link
Port security
It is used to prevent switching loops in networks with redundant switched routes.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

37. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Switches increase the number of collision domains in the network.
Encapsulations PPP and authentication CHAP
VTP
Congestion avoidance - Windowing and Buffering

38. 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.
Auto - Desirable - and On
Increased latency and Filtering of all frame errors
100 meters

39. 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?
Congestion avoidance - Windowing and Buffering
The port is experiencing errors
ARP and ICMP
802.1Q and ISL

40. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Path selections and Packet switching.
Packet switching - Packet filtering and Internetwork communication.
In an improperly implemented redundant topology
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

41. 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?
Auto - On - and Desirable
An additional broadcast domain will be created.
Congestion avoidance - Windowing and Buffering
Data link

42. 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
Switches increase the number of collision domains in the network.
ARP and ICMP
Show cdp neighbor detail

43. With regard to Ethernet media access methods - which of the following are true?
Packet switching - Packet filtering and Internetwork communication.
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.
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.

44. 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.
CertK Switch(config)# ip default-gateway 192.168.1.115
Switches increase the number of collision domains in the network.
A broadcast address will never be the source address of a frame

45. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Configure the switch so that it has lower priority than other switches in the network
Information about a route should never be sent back in the direction from which the original update came.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Network

46. 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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The system is malfunctioning.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

47. 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?
Layer 4
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

48. 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?
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.
100 meters
Auto - Desirable - and On
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

49. Which of the following correctly describe steps in the OSI date encapsulation process?
Auto - Desirable - and On
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.
To allow remote management of the switch.
Transport

50. 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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