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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. 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?
802.1Q and ISL
The network layer
An electrical pulse indicates that the collision has cleared.
Show arp and Show interface

2. Which of the following are spanning tree port states?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
TCP
Learning - Listening - and Forwarding
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.

3. 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 throughput than can half-duplex Ethernet of the same bandwidth
Application
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Certkiller B > trace

4. 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?
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.
A hub and A repeater.
Fiber optic cable.
An electrical pulse indicates that the collision has cleared.

5. 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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Show arp and Show interface
Layer 4
VLAN and Swtich

6. Which of the following services use TCP?
SMTP FTP and HTTP
VTP will allow switches to share VLAN configuration information
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Data link

7. 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?
The system is malfunctioning.
Increased latency and Filtering of all frame errors
Application
Sequence number - Window size - and Acknowledgment number

8. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
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
Show cdp neighbor detail
The network layer
Switches increase the number of collision domains in the network.

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
SMTP FTP and HTTP
The interfaces must be configured for NAT.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Auto - On - and Desirable

10. 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
Application
Duplex mismatch
To prevent switching loops in networks with redundant switched paths.

11. 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?
An additional broadcast domain will be created.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
It is the sum of the costs based on bandwidth
In an improperly implemented redundant topology

12. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
CertK Switch(config)# ip default-gateway 192.168.1.115
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
STP
HTTPS

13. Which of the following are true of Ethernet technology?
The interfaces must be configured for NAT.
The system is malfunctioning.
ARP and ICMP
Hosts use a logical bus topology

14. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Hosts use a logical bus topology
Congestion avoidance - Windowing and Buffering
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

15. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
The switch will forward the frame to a specific port
Transport
To allow remote management of the switch.

16. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Source Port - Acknowledgment Number - and Window
Layer 4
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

17. 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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18. What is the IEEE standard associated with Gigabit Ethernet?
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
MAC Address and Bridge Priority
Transport
802.3ab and 802.3z

19. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Switches increase the number of collision domains in the network.
Layer 4
Data link
A broadcast address will never be the source address of a frame

20. 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
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 sequence number in the TCP header.
An electrical pulse indicates that the collision has cleared.
Path selections and Packet switching.

21. 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?
It operates without collisions and It provides faster data transfer
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.
Hosts use a logical bus topology
ARP and ICMP

22. 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.
Auto - On - and Desirable
Port security
The switch will forward the frame to a specific port

23. 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?
802.1Q and ISL
Application
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.
This is an Ethernet port operating at half duplex

24. 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?
Sequence number - Window size - and Acknowledgment number
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
Congestion avoidance - Windowing and Buffering
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

25. 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?
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.
The system is malfunctioning.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Layer 3

26. CDP is running between two CK devices. What information is supplied by CDP?
It is the sum of the costs based on bandwidth
The network layer
Device Identifiers - Capabilities list - Platform
Data link

27. 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?
VTP
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
Sequence number - Window size - and Acknowledgment number
An additional broadcast domain will be created.

28. 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?
A broadcast address will never be the source address of a frame
Data link
The switch will forward the frame to a specific port
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

29. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
The interfaces must be configured for NAT.
STP
Switches - Bridges - and Routers
To allow remote management of the switch.

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?
Application
Sequence number - Window size - and Acknowledgment number
Packet switching - Packet filtering and Internetwork communication.
Certkiller B > trace

31. Which of the following correctly describe steps in the OSI date encapsulation process?
The network layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Encapsulations PPP and authentication CHAP
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.

32. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VLAN and Swtich
In an improperly implemented redundant topology
VTP will allow switches to share VLAN configuration information
Path selections and Packet switching.

33. 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?
Source Port - Acknowledgment Number - and Window
All switch and bridge ports are in either the forwarding or blocking state.
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 network layer

34. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
802.1Q and ISL
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.
HTTPS - SMTP - and TFTP
To allow remote management of the switch.

35. Which two of the following values does STP take into consideration when it elects the root bridge?
The interfaces must be configured for NAT.
The Bridgeg ID and The bridge priority
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Information about a route should never be sent back in the direction from which the original update came.

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?
VTP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Telnet and FTP
It is used to prevent switching loops in networks with redundant switched routes.

37. Cisco is the leader in the router market space. What basic functions do their routers perform in a 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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Switches increase the number of collision domains in the network.
Path selections and Packet switching.

38. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Auto - Desirable - and On
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.
Encapsulations PPP and authentication CHAP
VLAN and Swtich

39. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
This is an Ethernet port operating at half duplex
It is the sum of the costs based on bandwidth
Duplex mismatch

40. Which of the following can lead to the contribution of LAN traffic congestion?
Certkiller B > trace
Layer 4
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The switch will forward the frame to a specific port

41. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
802.3ab and 802.3z
All switch and bridge ports are in either the forwarding or blocking state.
Show arp and Show interface
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

42. 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?
A cross-over cable
Serial0/1 is down - line protocol is down
Information about a route should never be sent back in the direction from which the original update came.
Switches increase the number of collision domains in the network.

43. Which fields are included in the TCP header?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
To allow remote management of the switch.
STP
Source Port - Acknowledgment Number - and Window

44. Which OSI layer header contains the address of a destination host that is on another network?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.
Layer 4

45. 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?
The Bridgeg ID and The bridge priority
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 4
Buffering - Cut-through - and Congestion avoidance

46. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Encapsulations PPP and authentication CHAP
A broadcast address will never be the source address of a frame
Show cdp neighbor detail

47. 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?
Buffering - Cut-through - and Congestion avoidance
To prevent switching loops in networks with redundant switched paths.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
To allow remote management of the switch.

48. 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?
Data link
Switches - Bridges - and Routers
Physical Layer and Datalink Layer
Sequence number - Window size - and Acknowledgment number

49. Which of the following devices can the Certkiller network administrator use to segment the LAN?
The system is malfunctioning.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Switches - Bridges - and Routers
Fiber optic cable.

50. 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?
Transport
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Path selections and Packet switching.
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