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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. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
Information about a route should never be sent back in the direction from which the original update came.
The sequence number in the TCP header.
Physical Layer and Datalink Layer

2. 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?
Packet switching - Packet filtering and Internetwork communication.
The port is experiencing errors
Path selections and Packet switching.
802.1Q and ISL

3. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Congestion avoidance - Windowing and Buffering
Show cdp neighbor detail
Encapsulations PPP and authentication CHAP

4. Which fields are included in the TCP header?
ARP and ICMP
Source Port - Acknowledgment Number - and Window
CertK Switch(config)# ip default-gateway 192.168.1.115
VTP

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?
Serial0/1 is down - line protocol is down
Network
Telnet and FTP
Certkiller B > trace

6. 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
The switch will forward the frame to a specific port
Data link
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
STP

7. 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?
100 meters
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
Configure the switch so that it has a 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

8. Which of the following services use TCP?
The Bridgeg ID and The bridge priority
SMTP FTP and HTTP
It operates without collisions and It provides faster data transfer
Configure the switch so that it has a lower priority than other switches in the network.

9. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Layer 4
Switches - Bridges - and Routers
CertK Switch(config)# ip default-gateway 192.168.1.115
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

10. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
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.
Data link
Duplex mismatch
TCP

11. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
VLAN and Swtich
Network
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

12. 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)
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Certkiller B > trace
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.
SMTP - FTP - HTTP - and HTTPS

13. 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
100 meters
ARP and ICMP
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.

14. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
802.1Q and ISL
Auto - On - and Desirable
Show cdp neighbor detail

15. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
VTP will allow switches to share VLAN configuration information
Encapsulations PPP and authentication CHAP
Hosts use a logical bus topology
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.

16. 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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17. Which protocol uses TCP port 443 at layer 4?
The sequence number in the TCP header.
HTTPS
Show cdp neighbor detail
Packet switching - Packet filtering and Internetwork communication.

18. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Network
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

19. 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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Decrease the window size.

20. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
A cross-over cable
Buffering - Cut-through - and Congestion avoidance
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.
Auto - Desirable - and On

21. 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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A broadcast address will never be the source address of a frame
MAC Address and Bridge Priority
Decrease the window size.

22. In a switched LAN network - What is the Spanning-Tree algorithm used for?
VTP
It is used to prevent switching loops in networks with redundant switched routes.
HTTPS - SMTP - and TFTP
Source Port - Acknowledgment Number - and Window

23. Which of the protocols below use TCP at the transport layer?
An additional broadcast domain will be created.
Show arp and Show interface
802.3ab and 802.3z
SMTP - FTP - HTTP - and HTTPS

24. 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?
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
Source Port - Acknowledgment Number - and Window
ARP and ICMP
TCP

25. 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
STP
Switches - Bridges - and Routers
Learning - Listening - and Forwarding
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

26. 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?
Data link
Telnet and FTP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
VLAN and Swtich

27. 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
HTTPS
VTP will allow switches to share VLAN configuration information
Show arp and Show interface
A hub and A repeater.

28. 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?
Configure the switch so that it has a lower priority than other switches in the network.
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.
Switches increase the number of collision domains in the network.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

29. 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?
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
HTTPS
Sequence number - Window size - and Acknowledgment number
The interfaces must be configured for NAT.

30. 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
VLAN and Swtich
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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Auto - Desirable - and On

31. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Auto - Desirable - and On
HTTPS - SMTP - and TFTP
The interfaces must be configured for NAT.
Path selections and Packet switching.

32. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Layer 4
It operates without collisions and It provides faster data transfer
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.

33. 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?
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
Path selections and Packet switching.
Switches increase the number of collision domains in the network.

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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Application
Configure the switch so that it has a lower priority than other switches in the network.
CertK Switch(config)# ip default-gateway 192.168.1.115

35. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Buffering - Cut-through - and Congestion avoidance
Transport
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 broadcast address will never be the source address of a frame

36. 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?
Auto - Desirable - and On
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.
This is an Ethernet port operating at half duplex
CertK Switch(config)# ip default-gateway 192.168.1.115

37. 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 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.
Encapsulations PPP and authentication CHAP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

38. You want to influence the root bridge selection within the Certkiller LAN. Which two values are used by spanning tree protocol to elect a root bridge? (Choose two.)
Show cdp neighbor detail
Increased latency and Filtering of all frame errors
MAC Address and Bridge Priority
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

39. Which of the following are true of Ethernet technology?
HTTPS
It operates without collisions and It provides faster data transfer
SMTP - FTP - HTTP - and HTTPS
Hosts use a logical bus topology

40. Some of the older Certkiller switches store the entire frame before forwarding it to the destination. What are two effects on network performance of configuring a switch to do this?
Increased latency and Filtering of all frame errors
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
The sequence number in the TCP header.

41. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller 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.
Show cdp neighbor detail
The system is malfunctioning.
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

42. What is the purpose of the spanning-tree algorithm in a switched LAN?
It is the sum of the costs based on bandwidth
To prevent switching loops in networks with redundant switched paths.
VLAN and Swtich
VTP will allow switches to share VLAN configuration information

43. 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?
To prevent switching loops in networks with redundant switched paths.
Encapsulations PPP and authentication CHAP
CertK Switch(config)# ip default-gateway 192.168.1.115
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

44. 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.
Encapsulations PPP and authentication CHAP
802.3ab and 802.3z
VTP will allow switches to share VLAN configuration information

45. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
To allow remote management of the switch.
The Bridgeg ID and The bridge priority
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

46. Which of the following are spanning tree port states?
To allow remote management of the switch.
Learning - Listening - and Forwarding
Packet switching - Packet filtering and Internetwork communication.
Data link

47. CDP is running between two CK devices. What information is supplied by CDP?
The port is experiencing errors
Application
Device Identifiers - Capabilities list - Platform
Learning - Listening - and Forwarding

48. 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?
A broadcast address will never be the source address of a frame
Information about a route should never be sent back in the direction from which the original update came.
TCP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

49. 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.
It is used to prevent switching loops in networks with redundant switched routes.
To allow remote management of the switch.
The port is experiencing errors

50. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
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.
A hub and A repeater.