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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. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
All switch and bridge ports are in either the forwarding or blocking state.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Network
Information about a route should never be sent back in the direction from which the original update came.

2. 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?
Sequence number - Window size - and Acknowledgment number
Physical Layer and Datalink Layer
VLAN and Swtich
A broadcast address will never be the source address of a frame

3. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
MAC Address and Bridge Priority
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.
STP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

4. 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
The sequence number in the TCP header.
CertK Switch(config)# ip default-gateway 192.168.1.115
A cross-over cable
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

5. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Sequence number - Window size - and Acknowledgment number
Congestion avoidance - Windowing and Buffering
Network
In an improperly implemented redundant topology

6. Which three of the protocols below belong to the application layer? (Select three answer choices)
This is an Ethernet port operating at half duplex
Device Identifiers - Capabilities list - Platform
Layer 4
HTTPS - SMTP - and TFTP

7. 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?
A broadcast address will never be the source address of a frame
Increased latency and Filtering of all frame errors
All switch and bridge ports are in either the forwarding or blocking state.
SMTP FTP and HTTP

8. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Hosts use a logical bus topology
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
100 meters

9. 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
Path selections and Packet switching.
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.
Fiber optic cable.
Serial0/1 is down - line protocol is down

10. 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.)
Switches increase the number of collision domains in the network.
MAC Address and Bridge Priority
An additional broadcast domain will be created.
ARP and ICMP

11. By default - which of the following factors determines the spanning-tree path cost?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The sequence number in the TCP header.
It is the sum of the costs based on bandwidth
VTP

12. 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?
Fiber optic cable.
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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Encapsulations PPP and authentication CHAP

13. What are two characteristics of 'store and forward' switching?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.
In an improperly implemented redundant topology

14. 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?
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.
Transport
Certkiller B > trace

15. 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.
VTP will allow switches to share VLAN configuration information
It is the sum of the costs based on bandwidth
Data link

16. Which of the protocols below use TCP at the transport layer?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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
Application
SMTP - FTP - HTTP - and HTTPS

17. 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?
The port is experiencing errors
Application
Duplex mismatch
An electrical pulse indicates that the collision has cleared.

18. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Device Identifiers - Capabilities list - Platform
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.
It is used to prevent switching loops in networks with redundant switched routes.
Serial0/1 is down - line protocol is down

19. Which of the following services use TCP?
Telnet and FTP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
SMTP FTP and HTTP
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.

20. 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
Learning - Listening - and Forwarding
VLAN and Swtich
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Show arp and Show interface

21. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Auto - On - and Desirable
The switch will forward the frame to a specific port
A broadcast address will never be the source address of a frame
802.3ab and 802.3z

22. 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 system is malfunctioning.
VLAN and Swtich
Information about a route should never be sent back in the direction from which the original update came.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

23. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Decrease the window size.
Auto - Desirable - and On
Encapsulations PPP and authentication CHAP

24. 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?
Fiber optic cable.
Layer 3
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
SMTP FTP and HTTP

25. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
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 cross-over cable
Layer 4
Encapsulations PPP and authentication CHAP

26. 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?
Encapsulations PPP and authentication CHAP
Device Identifiers - Capabilities list - Platform
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.

27. 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?
To prevent switching loops in networks with redundant switched paths.
Telnet and FTP
Buffering - Cut-through - and Congestion avoidance
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

28. With regard to Ethernet media access methods - which of the following are true?
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
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

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?
To allow remote management of the switch.
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 interfaces must be configured for NAT.
To prevent switching loops in networks with redundant switched paths.

30. 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.
Data link
An additional broadcast domain will be created.
SMTP - FTP - HTTP - and HTTPS

31. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
MAC Address and Bridge Priority
Configure the switch so that it has lower priority than other switches in the network
TCP
A hub and A repeater.

32. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Application
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
Serial0/1 is down - line protocol is down

33. 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.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
It is used to prevent switching loops in networks with redundant switched routes.
Application

34. 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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35. 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?
Port security
Buffering - Cut-through - and Congestion avoidance
A cross-over cable
The Bridgeg ID and The bridge priority

36. Which of the following are types of flow control?
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
An electrical pulse indicates that the collision has cleared.
802.1Q and ISL
Buffering - Cut-through - and Congestion avoidance

37. Which of the following are true of Ethernet technology?
Increased latency and Filtering of all frame errors
Network
Hosts use a logical bus topology
VLAN and Swtich

38. 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?
Switches increase the number of collision domains in the network.
To allow remote management of the switch.
Layer 4
Duplex mismatch

39. 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?
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
An electrical pulse indicates that the collision has cleared.
This is an Ethernet port operating at half duplex
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

40. 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?
100 meters
Configure the switch so that it has a lower priority than other switches in the network.
An electrical pulse indicates that the collision has cleared.
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.

41. What is the purpose of the spanning-tree algorithm in a switched LAN?
An electrical pulse indicates that the collision has cleared.
VTP
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.
To prevent switching loops in networks with redundant switched paths.

42. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
STP
Data link
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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

43. 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?
Congestion avoidance - Windowing and Buffering
Port security
An electrical pulse indicates that the collision has cleared.
Sequence number - Window size - and Acknowledgment number

44. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
All switch and bridge ports are in either the forwarding or blocking state.
An additional broadcast domain will be created.
TCP

45. 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.
802.1Q and ISL
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 will forward the frame to a specific port

46. Which protocol uses TCP port 443 at layer 4?
HTTPS
CertK Switch(config)# ip default-gateway 192.168.1.115
TCP
Path selections and Packet switching.

47. Which of the following are spanning tree port states?
Device Identifiers - Capabilities list - Platform
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The sequence number in the TCP header.
Learning - Listening - and Forwarding

48. You are logged into a router and wish to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?
Show cdp neighbor detail
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.
Congestion avoidance - Windowing and Buffering
HTTPS

49. 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
Congestion avoidance - Windowing and Buffering
This is an Ethernet port operating at half duplex
The switch will forward the frame to a specific port

50. 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
HTTPS
The network layer
Auto - Desirable - and On
Increased latency and Filtering of all frame errors