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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. 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 switch will forward the frame to a specific port
Sequence number - Window size - and Acknowledgment number
Data link
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

2. 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.
This is an Ethernet port operating at half duplex
SMTP - FTP - HTTP - and HTTPS
An electrical pulse indicates that the collision has cleared.

3. 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?
Layer 4
SMTP - FTP - HTTP - and HTTPS
Switches increase the number of collision domains in the network.
An additional broadcast domain will be created.

4. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Decrease the window size.
The port is experiencing errors
Port security

5. Which of the protocols below use TCP at the transport layer?
Port security
SMTP FTP and HTTP
SMTP - FTP - HTTP - and HTTPS
Serial0/1 is down - line protocol is down

6. 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?
The network layer
Auto - On - and Desirable
CertK Switch(config)# ip default-gateway 192.168.1.115
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

7. 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
Configure the switch so that it has lower priority than other switches in the network
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Hosts use a logical bus topology

8. 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.
HTTPS - SMTP - and TFTP
In an improperly implemented redundant topology
The system is malfunctioning.

9. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The system is malfunctioning.
100 meters

10. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Layer 4
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
All switch and bridge ports are in either the forwarding or blocking state.
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.

11. Which fields are included in the TCP header?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Source Port - Acknowledgment Number - and Window
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Auto - Desirable - and On

12. What is the purpose of the spanning-tree algorithm in a switched LAN?
Hosts use a logical bus topology
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Switches increase the number of collision domains in the network.
To prevent switching loops in networks with redundant switched paths.

13. 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?
Physical Layer and Datalink Layer
TCP
Learning - Listening - and Forwarding
Application

14. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Auto - Desirable - and On
The sequence number in the TCP header.

15. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
It is used to prevent switching loops in networks with redundant switched routes.
Port security
All switch and bridge ports are in either the forwarding or blocking state.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

16. 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
Path selections and Packet switching.
Duplex mismatch
STP
Switches increase the number of collision domains in the network.

17. 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.)
The network layer
MAC Address and Bridge Priority
Application
Auto - On - and Desirable

18. Which two of the following values does STP take into consideration when it elects the root bridge?
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.
A broadcast address will never be the source address of a frame
The Bridgeg ID and The bridge priority
SMTP FTP and HTTP

19. What is the IEEE standard associated with Gigabit Ethernet?
Application
Application
802.3ab and 802.3z
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

20. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Information about a route should never be sent back in the direction from which the original update came.
Layer 3
802.3ab and 802.3z
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

21. 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.
It is used to prevent switching loops in networks with redundant switched routes.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Show arp and Show interface

22. CDP is running between two CK devices. What information is supplied by CDP?
Network
Device Identifiers - Capabilities list - Platform
Fiber optic cable.
Layer 4

23. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Sequence number - Window size - and Acknowledgment number
A broadcast address will never be the source address of a frame
CertK Switch(config)# ip default-gateway 192.168.1.115
Auto - On - and Desirable

24. 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
STP
Show arp and Show interface
HTTPS

25. 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?
Port security
The port is experiencing errors
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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.

26. 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?
The interfaces must be configured for NAT.
802.1Q and ISL
Port security
The system is malfunctioning.

27. 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
Decrease the window size.
100 meters
A broadcast address will never be the source address of a frame

28. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
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
Auto - Desirable - and On
Path selections and Packet switching.
Configure the switch so that it has lower priority than other switches in the network

29. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
ARP and ICMP
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 - SMTP - and TFTP
An additional broadcast domain will be created.

30. 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
Data link
Network
Information about a route should never be sent back in the direction from which the original update came.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

31. A new switch is installed in the Certkiller network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network. Which of the conditions below have to be met in o
Duplex mismatch
Path selections and Packet switching.
Congestion avoidance - Windowing and Buffering
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.

32. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
Hosts use a logical bus topology
Data link
Sequence number - Window size - and Acknowledgment number

33. 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?
Application
The interfaces must be configured for NAT.
Port security
ARP and ICMP

34. Which of the following correctly describe steps in the OSI date encapsulation process?
SMTP - FTP - HTTP - and HTTPS
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.
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.

35. Which protocol uses TCP port 443 at layer 4?
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.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
HTTPS
SMTP - FTP - HTTP - and HTTPS

36. 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?
VTP
The network layer
It is used to prevent switching loops in networks with redundant switched routes.
Certkiller B > trace

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?
It is the sum of the costs based on bandwidth
Layer 3
Learning - Listening - and Forwarding
Congestion avoidance - Windowing and Buffering

38. 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?
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
Source Port - Acknowledgment Number - and Window
TCP
Layer 4

39. What kind of cable should be used to establish a trunked line between two Catalyst switches?
VTP
Data link
Application
A cross-over cable

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

41. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
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.
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.
Serial0/1 is down - line protocol is down

42. 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?
Hosts use a logical bus topology
To allow remote management of the switch.
ARP and ICMP
Data link

43. What are two characteristics of 'store and forward' switching?
Switches increase the number of collision domains in the network.
VLAN and Swtich
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

44. 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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The port is experiencing errors
Show arp and Show interface

45. 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
Auto - Desirable - and On
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Application

46. Which of the following are types of flow control?
The interfaces must be configured for NAT.
Buffering - Cut-through - and Congestion avoidance
Congestion avoidance - Windowing and Buffering
Encapsulations PPP and authentication CHAP

47. By default - which of the following factors determines the spanning-tree path cost?
VLAN and Swtich
Buffering - Cut-through - and Congestion avoidance
It is the sum of the costs based on bandwidth
Application

48. 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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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

49. Which three of the protocols below belong to the application layer? (Select three answer choices)
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Decrease the window size.
Device Identifiers - Capabilities list - Platform
HTTPS - SMTP - and TFTP

50. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
Auto - Desirable - and On
This is an Ethernet port operating at half duplex
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth