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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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 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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2. 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?
HTTPS - SMTP - and TFTP
Port security
Application
The network layer

3. 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
MAC Address and Bridge Priority
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
VLAN and Swtich

4. 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?
An additional broadcast domain will be created.
A cross-over cable
It is used to prevent switching loops in networks with redundant switched routes.
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.

5. Which of the following are types of flow control?
802.1Q and ISL
The network layer
Buffering - Cut-through - and Congestion avoidance
Source Port - Acknowledgment Number - and Window

6. Which of the following are spanning tree port states?
It will prevent segment 1's broadcasts from getting to segment 2.
Learning - Listening - and Forwarding
CertK Switch(config)# ip default-gateway 192.168.1.115
Layer 3

7. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
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.
CertK Switch(config)# ip default-gateway 192.168.1.115
Network

8. 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?
This is an Ethernet port operating at half duplex
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.
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.
In an improperly implemented redundant topology

9. Which OSI layer header contains the address of a destination host that is on another network?
Network
It is used to prevent switching loops in networks with redundant switched routes.
The port is experiencing errors
An additional broadcast domain will be created.

10. 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?
Congestion avoidance - Windowing and Buffering
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
Show cdp neighbor detail
Configure the switch so that it has a lower priority than other switches in the network.

11. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
HTTPS
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.

12. 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?
Transport
Certkiller B > trace
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Configure the switch so that it has a lower priority than other switches in the network.

13. 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.
STP
Learning - Listening - and Forwarding
The port is experiencing errors

14. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
A hub and A repeater.
This is an Ethernet port operating at half duplex
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
Information about a route should never be sent back in the direction from which the original update came.

15. 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.
Layer 4
Configure the switch so that it has lower priority than other switches in the network
To allow remote management of the switch.

16. Which of the following services use TCP?
To prevent switching loops in networks with redundant switched paths.
SMTP FTP and HTTP
The Bridgeg ID and The bridge priority
It is the sum of the costs based on bandwidth

17. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
Network
Data link
To allow remote management of the switch.

18. 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
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.
SMTP FTP and HTTP
Information about a route should never be sent back in the direction from which the original update came.
CertK Switch(config)# ip default-gateway 192.168.1.115

19. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
A hub and A repeater.
Physical Layer and Datalink Layer
STP
Data link

20. 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
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Path selections and Packet switching.
Fiber optic cable.
Certkiller B > trace

21. Which of the following can lead to the contribution of LAN traffic congestion?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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
To prevent switching loops in networks with redundant switched paths.

22. 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?
All switch and bridge ports are in either the forwarding or blocking state.
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
Layer 4
A hub and A repeater.

23. By default - which of the following factors determines the spanning-tree path cost?
Device Identifiers - Capabilities list - Platform
CertK Switch(config)# ip default-gateway 192.168.1.115
It is the sum of the costs based on bandwidth
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

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?
Layer 3
VTP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

25. 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
Learning - Listening - and Forwarding
Layer 4
Layer 4
The network layer

26. Which of the following correctly describe the various functions and virtues of a router?
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Packet switching - Packet filtering and Internetwork communication.
Layer 3

27. 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?
Hosts use a logical bus topology
It is used to prevent switching loops in networks with redundant switched routes.
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.
100 meters

28. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Data link
Fiber optic cable.
Path selections and Packet switching.
The switch will forward the frame to a specific port

29. The CK network administrator needs to determine what LAN devices to install on the CK network. What are two advantages of using Layer 2 Ethernet switches over hubs?
Path selections and Packet switching.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
HTTPS

30. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Packet switching - Packet filtering and Internetwork communication.
Auto - On - and Desirable
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
100 meters

31. 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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Learning - Listening - and Forwarding
Layer 4

32. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
To allow remote management of the switch.
802.1Q and ISL
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.
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 three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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
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.
Hosts use a logical bus topology
Congestion avoidance - Windowing and Buffering

34. 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
Configure the switch so that it has lower priority than other switches in the network
Network
VLAN and Swtich
Physical Layer and Datalink Layer

35. 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
Layer 4
The port is experiencing errors
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

36. 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?
Encapsulations PPP and authentication CHAP
Transport
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The port is experiencing errors

37. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Configure the switch so that it has lower priority than other switches in the network
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

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?
Telnet and FTP
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 arp and Show interface
Device Identifiers - Capabilities list - Platform

39. Which protocol uses TCP port 443 at layer 4?
The network layer
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.
HTTPS

40. 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.
Layer 4
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.

41. 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?
Certkiller B > trace
The network layer
Data link
Switches increase the number of collision domains in the network.

42. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
Hosts use a logical bus topology
An additional broadcast domain will be created.
Port security

43. CDP is running between two CK devices. What information is supplied by CDP?
Encapsulations PPP and authentication CHAP
Device Identifiers - Capabilities list - Platform
Application
Path selections and Packet switching.

44. 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?
Serial0/1 is down - line protocol is down
Switches increase the number of collision domains in the 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
The port is experiencing errors

45. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
The network layer
A hub and A repeater.
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

46. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Information about a route should never be sent back in the direction from which the original update came.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Switches - Bridges - and Routers

47. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
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 network layer
Layer 4
Path selections and Packet switching.

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?
It is used to prevent switching loops in networks with redundant switched routes.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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.
Data link

49. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
SMTP FTP and HTTP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Encapsulations PPP and authentication CHAP
Data link

50. Which of the following are true of Ethernet technology?
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
Hosts use a logical bus topology
In an improperly implemented redundant topology
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

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