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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. By default - which of the following factors determines the spanning-tree path cost?
The port is experiencing errors
The network layer
It is the sum of the costs based on bandwidth
A hub and A repeater.

2. Which of the following services use TCP?
VLAN and Swtich
SMTP FTP and HTTP
Switches - Bridges - and Routers
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

3. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Application
A broadcast address will never be the source address of a frame
The system is malfunctioning.
In an improperly implemented redundant topology

4. 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?
The Bridgeg ID and The bridge priority
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Physical Layer and Datalink Layer
SMTP FTP and HTTP

5. Which OSI layer header contains the address of a destination host that is on another network?
Network
Transport
TCP
It is used to prevent switching loops in networks with redundant switched routes.

6. 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
Configure the switch so that it has a lower priority than other switches in the network.
The switch will forward the frame to a specific port
It will prevent segment 1's broadcasts from getting to segment 2.

7. What is the purpose of the spanning-tree algorithm in a switched LAN?
Path selections and Packet switching.
The sequence number in the TCP header.
To prevent switching loops in networks with redundant switched paths.
Congestion avoidance - Windowing and Buffering

8. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
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
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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Learning - Listening - and Forwarding

9. 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.)
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
VTP
MAC Address and Bridge Priority
VTP will allow switches to share VLAN configuration information

10. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
All switch and bridge ports are in either the forwarding or blocking state.
Data link
To prevent switching loops in networks with redundant switched paths.

11. 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
STP
Layer 3

12. Which of the following devices can the Certkiller network administrator use to segment the LAN?
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 cross-over cable
Port security
Switches - Bridges - and Routers

13. 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?
The switch will forward the frame to a specific port
Certkiller B > trace
Telnet and FTP
Configure the switch so that it has lower priority than other switches in the network

14. With regard to Ethernet media access methods - which of the following are true?
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.
Sequence number - Window size - and Acknowledgment number
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.
A cross-over cable

15. Which two of the following values does STP take into consideration when it elects the root bridge?
A hub and A repeater.
The Bridgeg ID and The bridge priority
To prevent switching loops in networks with redundant switched paths.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

16. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
All switch and bridge ports are in either the forwarding or blocking state.
Congestion avoidance - Windowing and Buffering
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

17. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
SMTP - FTP - HTTP - and HTTPS
It operates without collisions and It provides faster data transfer
Path selections and Packet switching.
Source Port - Acknowledgment Number - and Window

18. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
Layer 4
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

19. 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
HTTPS
Data link
Transport

20. 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?
ARP and ICMP
Show cdp neighbor detail
Data link
Layer 4

21. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
802.1Q and ISL
Switches increase the number of collision domains in the network.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
SMTP FTP and HTTP

22. 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
Auto - On - and Desirable
Data link
Switches increase the number of collision domains in the network.
Configure the switch so that it has a lower priority than other switches in the network.

23. 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.
Data link
Switches - Bridges - and Routers
TCP

24. 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?
SMTP - FTP - HTTP - and HTTPS
Port security
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
Path selections and Packet switching.

25. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.

26. 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?
TCP
Congestion avoidance - Windowing and Buffering
Serial0/1 is down - line protocol is down
Fiber optic cable.

27. 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?
VTP
Increased latency and Filtering of all frame errors
A hub and A repeater.
The interfaces must be configured for NAT.

28. 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?
Layer 3
A cross-over cable
A hub and A repeater.
An electrical pulse indicates that the collision has cleared.

29. 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
An electrical pulse indicates that the collision has cleared.
Layer 3
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

30. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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 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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Application

31. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The system is malfunctioning.
Auto - Desirable - and On
This is an Ethernet port operating at half duplex

32. What is the IEEE standard associated with Gigabit Ethernet?
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.
It is used to prevent switching loops in networks with redundant switched routes.
802.3ab and 802.3z
Application

33. What are two characteristics of 'store and forward' switching?
Learning - Listening - and Forwarding
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Serial0/1 is down - line protocol is down
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.

34. 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?
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
Switches - Bridges - and Routers
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.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

35. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
Buffering - Cut-through - and Congestion avoidance
The Bridgeg ID and The bridge priority
It is used to prevent switching loops in networks with redundant switched routes.

36. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
ARP and ICMP
Auto - Desirable - and On
It is used to prevent switching loops in networks with redundant switched routes.
Data link

37. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
Show arp and Show interface
Layer 3
VLAN and Swtich

38. 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?
Fiber optic cable.
ARP and ICMP
Learning - Listening - and Forwarding
It is used to prevent switching loops in networks with redundant switched routes.

39. 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 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.
Increased latency and Filtering of all frame errors
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Network

40. 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?
Serial0/1 is down - line protocol is down
The port is experiencing errors
An additional broadcast domain will be created.
TCP

41. 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.
A cross-over cable
Information about a route should never be sent back in the direction from which the original update came.
Encapsulations PPP and authentication CHAP

42. Which protocol uses TCP port 443 at layer 4?
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
HTTPS
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

43. 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
Hosts use a logical bus topology
Show cdp neighbor detail
Layer 4
The network layer

44. 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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
This is an Ethernet port operating at half duplex
Configure the switch so that it has a lower priority than other switches in the network.

45. Which fields are included in the TCP header?
Learning - Listening - and Forwarding
Source Port - Acknowledgment Number - and Window
The interfaces must be configured for NAT.
Duplex mismatch

46. 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
Buffering - Cut-through - and Congestion avoidance
Duplex mismatch
VLAN and Swtich

47. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
A hub and A repeater.
HTTPS - SMTP - and TFTP
Encapsulations PPP and authentication CHAP

48. Which of the following are true of Ethernet technology?
Transport
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Hosts use a logical bus topology
The system is malfunctioning.

49. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
The sequence number in the TCP header.
Network
Show arp and Show interface
Layer 4

50. 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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