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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. 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?
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.
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
802.1Q and ISL
Increased latency and Filtering of all frame errors

2. 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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Configure the switch so that it has lower priority than other switches in 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.

3. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Layer 4
CertK Switch(config)# ip default-gateway 192.168.1.115
Device Identifiers - Capabilities list - Platform
Encapsulations PPP and authentication CHAP

4. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
The system is malfunctioning.
Configure the switch so that it has lower priority than other switches in the network
Switches - Bridges - and Routers
In an improperly implemented redundant topology

5. 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?
Hosts use a logical bus topology
Serial0/1 is down - line protocol is down
ARP and ICMP
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.

6. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
The network layer
Auto - On - and Desirable
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Network

7. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
It operates without collisions and It provides faster data transfer
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.
Data link
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

8. 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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9. 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?
Configure the switch so that it has lower priority than other switches 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.
Source Port - Acknowledgment Number - and Window
Physical Layer and Datalink Layer

10. 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
CertK Switch(config)# ip default-gateway 192.168.1.115
Path selections and Packet switching.
Source Port - Acknowledgment Number - and Window
Fiber optic cable.

11. 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
Configure the switch so that it has lower priority than other switches in the network
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Switches - Bridges - and Routers
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.

12. 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
Path selections and Packet switching.
The sequence number in the TCP header.
Auto - Desirable - and On
Switches - Bridges - and Routers

13. Which of the protocols below use TCP at the transport layer?
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 - HTTP - and HTTPS
To prevent switching loops in networks with redundant switched paths.
VTP will allow switches to share VLAN configuration information

14. 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?
Auto - Desirable - and On
802.3ab and 802.3z
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 will forward the frame to a specific port

15. 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?
Path selections and Packet switching.
Show arp and Show interface
CertK Switch(config)# ip default-gateway 192.168.1.115
The interfaces must be configured for NAT.

16. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Port security
SMTP FTP and HTTP
Path selections and Packet switching.
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.

17. Why is full-duplex Ethernet superior to its single-duplex counterpart?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
It operates without collisions and It provides faster data transfer
ARP and ICMP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

18. 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.
It will prevent segment 1's broadcasts from getting to segment 2.
Auto - Desirable - and On
Layer 4

19. 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
Transport
VLAN and Swtich
Data link
Certkiller B > trace

20. 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
The Bridgeg ID and The bridge priority
Configure the switch so that it has lower priority than other switches in the network
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

21. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The sequence number in the TCP header.
100 meters
All switch and bridge ports are in either the forwarding or blocking state.

22. Which three of the protocols below belong to the application layer? (Select three answer choices)
To allow remote management of the switch.
HTTPS - SMTP - and TFTP
Encapsulations PPP and authentication CHAP
It will prevent segment 1's broadcasts from getting to segment 2.

23. Which protocol uses TCP port 443 at layer 4?
This is an Ethernet port operating at half duplex
Sequence number - Window size - and Acknowledgment number
Device Identifiers - Capabilities list - Platform
HTTPS

24. 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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
To allow remote management of the switch.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

25. 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?
Decrease the window size.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Layer 3
Hosts use a logical bus topology

26. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
Layer 4
Duplex mismatch
The network layer

27. 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
The system is malfunctioning.
HTTPS - SMTP - and TFTP

28. 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
To prevent switching loops in networks with redundant switched paths.
Duplex mismatch
Configure the switch so that it has lower priority than other switches in the network
CertK Switch(config)# ip default-gateway 192.168.1.115

29. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The switch will forward the frame to a specific port
The system is malfunctioning.
Source Port - Acknowledgment Number - and Window
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.

30. 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
It is used to prevent switching loops in networks with redundant switched routes.
Show arp and Show interface
MAC Address and Bridge Priority
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

31. Which of the following services use TCP?
SMTP FTP and HTTP
It is used to prevent switching loops in networks with redundant switched routes.
Hosts use a logical bus topology
Physical Layer and Datalink Layer

32. Which OSI layer header contains the address of a destination host that is on another network?
Network
Packet switching - Packet filtering and Internetwork communication.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Serial0/1 is down - line protocol is down

33. Which of the following are spanning tree port states?
SMTP - FTP - HTTP - and HTTPS
Learning - Listening - and Forwarding
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.

34. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
The network layer
Switches increase the number of collision domains in the network.
Congestion avoidance - Windowing and Buffering
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

35. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Data link
Layer 4
Auto - On - and Desirable
VLAN and Swtich

36. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Layer 3
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
Layer 4
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.

37. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
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 switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Learning - Listening - and Forwarding

38. Which fields are included in the TCP header?
To allow remote management of the switch.
Duplex mismatch
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.
Source Port - Acknowledgment Number - and Window

39. Which of the following can lead to the contribution of LAN traffic congestion?
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 system is malfunctioning.
Too many hosts in a broadcast domain - Broadcast storms and Low 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.

40. Which two of the following values does STP take into consideration when it elects the root bridge?
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.
Layer 4
The Bridgeg ID and The bridge priority
Physical Layer and Datalink Layer

41. 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?
Application
A cross-over cable
The system is malfunctioning.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

42. 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?
VTP will allow switches to share VLAN configuration information
Sequence number - Window size - and Acknowledgment number
This is an Ethernet port operating at half duplex
Show arp and Show interface

43. 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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

44. 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
It will prevent segment 1's broadcasts from getting to segment 2.
MAC Address and Bridge Priority
Application

45. 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?
Configure the switch so that it has lower priority than other switches in the network
Auto - On - and Desirable
Layer 3
Sequence number - Window size - and Acknowledgment number

46. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Packet switching - Packet filtering and Internetwork communication.
Certkiller B > trace

47. 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)
Information about a route should never be sent back in the direction from which the original update came.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
STP

48. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Layer 3
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.
This is an Ethernet port operating at half duplex

49. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Congestion avoidance - Windowing and Buffering
Network
It operates without collisions and It provides faster data transfer

50. What is the IEEE standard associated with Gigabit Ethernet?
100 meters
Port security
802.3ab and 802.3z
It is the sum of the costs based on bandwidth