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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. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
Show arp and Show interface
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The Bridgeg ID and The bridge priority

2. 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.
802.3ab and 802.3z
Application
This is an Ethernet port operating at half duplex
Device Identifiers - Capabilities list - Platform

3. 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
Configure the switch so that it has a lower priority than other switches in the network.
Show arp and Show interface
Data link
Buffering - Cut-through - and Congestion avoidance

4. Which of the protocols below use TCP at the transport layer?
SMTP FTP and HTTP
The network layer
To allow remote management of the switch.
SMTP - FTP - HTTP - and HTTPS

5. 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?
TCP
802.3ab and 802.3z
It operates without collisions and It provides faster data transfer
Telnet and FTP

6. 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
In an improperly implemented redundant topology
Physical Layer and Datalink Layer
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
Fiber optic cable.

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?
Hosts use a logical bus topology
Increased latency and Filtering of all frame errors
VTP will allow switches to share VLAN configuration information
Application

8. 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 network layer
VLAN and Swtich
Sequence number - Window size - and Acknowledgment number
Configure the switch so that it has lower priority than other switches in the network

9. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
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
HTTPS
Transport
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.

10. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Application
Data link
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Increased latency and Filtering of all frame errors

11. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Telnet and FTP
Layer 4
Certkiller B > trace
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

12. By default - which of the following factors determines the spanning-tree path cost?
802.3ab and 802.3z
SMTP - FTP - HTTP - and HTTPS
It is the sum of the costs based on bandwidth
Telnet and FTP

13. 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?
Physical Layer and Datalink Layer
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
An electrical pulse indicates that the collision has cleared.
Transport

14. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
The interfaces must be configured for NAT.
VTP
The network layer
Information about a route should never be sent back in the direction from which the original update came.

15. 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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Application
HTTPS
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

16. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
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
Hosts use a logical bus topology
Show arp and Show interface

17. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
A broadcast address will never be the source address of a frame
Network
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. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
The system is malfunctioning.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
HTTPS
Increased latency and Filtering of all frame errors

19. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
An additional broadcast domain will be created.
Transport
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
It will prevent segment 1's broadcasts from getting to segment 2.

20. 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
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.
Port security
802.3ab and 802.3z

21. 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.
Transport
The network layer
Data link

22. 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?
In an improperly implemented redundant topology
VTP
All switch and bridge ports are in either the forwarding or blocking state.
Certkiller B > trace

23. Which fields are included in the TCP header?
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.
ARP and ICMP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Source Port - Acknowledgment Number - and Window

24. 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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25. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
In an improperly implemented redundant topology
VTP
Port security
802.1Q and ISL

26. 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?
The system is malfunctioning.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
VTP
Layer 3

27. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
An additional broadcast domain will be created.
Fiber optic cable.
Path selections and Packet switching.
100 meters

28. 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.
An additional broadcast domain will be created.
Network
Buffering - Cut-through - and Congestion avoidance

29. 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?
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
Certkiller B > trace
Configure the switch so that it has a lower priority than other switches in the network.
MAC Address and Bridge Priority

30. Which of the following correctly describe steps in the OSI date encapsulation process?
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.
Packet switching - Packet filtering and Internetwork communication.
Port security
Auto - On - and Desirable

31. 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
802.1Q and ISL
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Encapsulations PPP and authentication CHAP

32. 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
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The sequence number in the TCP header.
Certkiller B > trace

33. 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?
Buffering - Cut-through - and Congestion avoidance
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Port security
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

34. As a Certkiller trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
This is an Ethernet port operating at half duplex
CertK Switch(config)# ip default-gateway 192.168.1.115
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.
Hosts use a logical bus topology

35. 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?
ARP and ICMP
Learning - Listening - and Forwarding
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 uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

36. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
The network layer
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.
Data link
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

37. Why is full-duplex Ethernet superior to its single-duplex counterpart?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
100 meters
VLAN and Swtich
It operates without collisions and It provides faster data transfer

38. 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?
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.
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.
100 meters

39. 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?
100 meters
SMTP - FTP - HTTP - and HTTPS
Switches increase the number of collision domains in the network.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

40. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
An electrical pulse indicates that the collision has cleared.
The Bridgeg ID and The bridge priority
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.

41. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Application
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
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.
Switches increase the number of collision domains in the network.

42. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Application
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
HTTPS - SMTP - and TFTP
Auto - Desirable - and On

43. With regard to Ethernet media access methods - which of the following are true?
To allow remote management of the switch.
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.
Transport
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

44. Which of the following are spanning tree port states?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Learning - Listening - and Forwarding
The interfaces must be configured for NAT.
SMTP FTP and HTTP

45. 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)
Show arp and Show interface
Duplex mismatch
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The switch will forward the frame to a specific port

46. 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
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
Duplex mismatch
VLAN and Swtich
All switch and bridge ports are in either the forwarding or blocking state.

47. Which protocol uses TCP port 443 at layer 4?
Sequence number - Window size - and Acknowledgment number
100 meters
It is used to prevent switching loops in networks with redundant switched routes.
HTTPS

48. 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?
To allow remote management of the switch.
Device Identifiers - Capabilities list - Platform
The interfaces must be configured for NAT.
Configure the switch so that it has a lower priority than other switches in the network.

49. 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 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.
VLAN and Swtich
Certkiller B > trace
The network layer

50. 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?
Information about a route should never be sent back in the direction from which the original update came.
Physical Layer and Datalink Layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
100 meters