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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. 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
An additional broadcast domain will be created.
The sequence number in the TCP header.
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.
Packet switching - Packet filtering and Internetwork communication.

2. 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?
Layer 3
Decrease the window size.
Switches increase the number of collision domains 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.

3. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Duplex mismatch
Network

4. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
802.1Q and ISL
Information about a route should never be sent back in the direction from which the original update came.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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.

5. 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
Telnet and FTP
CertK Switch(config)# ip default-gateway 192.168.1.115
MAC Address and Bridge Priority

6. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
The system is malfunctioning.
Data link
Hosts use a logical bus topology
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.

7. 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
The sequence number in the TCP header.
Duplex mismatch
The network layer
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

8. Which of the following are spanning tree port states?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
To allow remote management of the switch.
Learning - Listening - and Forwarding
The switch will forward the frame to a specific port

9. 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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10. 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?
Hosts use a logical bus topology
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.
The port is experiencing errors
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.

11. 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?
Decrease the window size.
Certkiller B > trace
Duplex mismatch
Congestion avoidance - Windowing and Buffering

12. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
An additional broadcast domain will be created.
Telnet and FTP
Auto - On - and Desirable

13. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Auto - On - and Desirable
The Bridgeg ID and The bridge priority
Path selections and Packet switching.
802.3ab and 802.3z

14. Which of the protocols below use TCP at the transport layer?
Layer 4
Network
Application
SMTP - FTP - HTTP - and HTTPS

15. By default - which of the following factors determines the spanning-tree path cost?
It is used to prevent switching loops in networks with redundant switched routes.
It is the sum of the costs based on bandwidth
The switch will forward the frame to a specific port
This is an Ethernet port operating at half duplex

16. 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?
MAC Address and Bridge Priority
An additional broadcast domain will be created.
Data link
HTTPS

17. What is the purpose of the spanning-tree algorithm in a switched LAN?
HTTPS
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
To prevent switching loops in networks with redundant switched paths.
Transport

18. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
VTP
Show cdp neighbor detail
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.
HTTPS

19. 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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
A cross-over cable
VLAN and Swtich

20. 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?
802.1Q and ISL
Path selections and Packet switching.
Serial0/1 is down - line protocol is down
To allow remote management of the switch.

21. 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?
Telnet and FTP
The interfaces must be configured for NAT.
A hub and A repeater.
Source Port - Acknowledgment Number - and Window

22. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Duplex mismatch
Network
It is used to prevent switching loops in networks with redundant switched routes.

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

24. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
A hub and A repeater.
Serial0/1 is down - line protocol is down
An electrical pulse indicates that the collision has cleared.
Data link

25. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
Serial0/1 is down - line protocol is down
ARP and ICMP
Buffering - Cut-through - and Congestion avoidance

26. 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?
Network
Port security
The switch will forward the frame to a specific port
All switch and bridge ports are in either the forwarding or blocking state.

27. 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 is the sum of the costs based on bandwidth
ARP and ICMP
The Bridgeg ID and The bridge priority
It is used to prevent switching loops in networks with redundant switched routes.

28. 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?
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.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Switches increase the number of collision domains in the network.

29. 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?
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
Application
Switches - Bridges - and Routers
VTP

30. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Switches increase the number of collision domains in the network.
Layer 3
STP

31. Which three of the protocols below belong to the application layer? (Select three answer choices)
It is used to prevent switching loops in networks with redundant switched routes.
Path selections and Packet switching.
Data link
HTTPS - SMTP - and TFTP

32. In a switched LAN network - What is the Spanning-Tree algorithm used for?
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.
The interfaces must be configured for NAT.
Hosts use a logical bus topology

33. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Data link
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.
This is an Ethernet port operating at half duplex
Serial0/1 is down - line protocol is down

34. Which two of the following values does STP take into consideration when it elects 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
Congestion avoidance - Windowing and Buffering
The Bridgeg ID and The bridge priority
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

35. 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.
Hosts use a logical bus topology
802.3ab and 802.3z
Layer 4
Application

36. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Port security
In an improperly implemented redundant topology
It is used to prevent switching loops in networks with redundant switched routes.

37. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
The sequence number in the TCP header.
SMTP FTP and HTTP
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
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

38. 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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Telnet and FTP
Buffering - Cut-through - and Congestion avoidance

39. 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?
Buffering - Cut-through - and Congestion avoidance
The switch will forward the frame to a specific port
100 meters
STP

40. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
An electrical pulse indicates that the collision has cleared.
Encapsulations PPP and authentication CHAP
CertK Switch(config)# ip default-gateway 192.168.1.115

41. What are two characteristics of 'store and forward' switching?
The Bridgeg ID and The bridge priority
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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
It will prevent segment 1's broadcasts from getting to segment 2.

42. 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?
Decrease the window size.
Congestion avoidance - Windowing and Buffering
100 meters
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

43. 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
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
SMTP FTP and HTTP
Network

44. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
The sequence number in the TCP header.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Network
Decrease the window size.

45. 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?
Network
Configure the switch so that it has a lower priority than other switches in the network.
Auto - Desirable - and On
100 meters

46. 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
Certkiller B > trace
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Duplex mismatch

47. Which protocol uses TCP port 443 at layer 4?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Switches - Bridges - and Routers
HTTPS
Telnet and FTP

48. 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
VTP will allow switches to share VLAN configuration information
VLAN and Swtich
CertK Switch(config)# ip default-gateway 192.168.1.115
Decrease the window size.

49. 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 operates without collisions and It provides faster data transfer
Decrease the window size.
Layer 3
Sequence number - Window size - and Acknowledgment number

50. 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
Application
Fiber optic cable.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.