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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. Both bridges are switches are being used throughout the CK LAN. Which of the following statements are true regarding bridges and switches in this network?
ARP and ICMP
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.
Increased latency and Filtering of all frame errors
Encapsulations PPP and authentication CHAP

2. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Configure the switch so that it has a lower priority than other switches in the network.
Switches increase the number of collision domains in the network.
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.
Auto - On - and Desirable

3. 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?
An additional broadcast domain will be created.
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
Hosts use a logical bus topology
All switch and bridge ports are in either the forwarding or blocking state.

4. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
It is used to prevent switching loops in networks with redundant switched routes.
Encapsulations PPP and authentication CHAP
Switches increase the number of collision domains in the network.
In an improperly implemented redundant topology

5. 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.
A cross-over cable
The Bridgeg ID and The bridge priority
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.

6. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
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
Application
Layer 4

7. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Switches increase the number of collision domains in the network.
The interfaces must be configured for NAT.
802.1Q and ISL
Device Identifiers - Capabilities list - Platform

8. 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?
Switches increase the number of collision domains in the network.
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.
The interfaces must be configured for NAT.
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.

9. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Fiber optic cable.
Packet switching - Packet filtering and Internetwork communication.
HTTPS - SMTP - and TFTP
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.

10. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
Auto - Desirable - and On
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Congestion avoidance - Windowing and Buffering

11. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
TCP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
A broadcast address will never be the source address of a frame
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

12. 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?
Congestion avoidance - Windowing and Buffering
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Physical Layer and Datalink Layer
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.

13. 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?
An additional broadcast domain will be created.
ARP and ICMP
Duplex mismatch
It operates without collisions and It provides faster data transfer

14. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
Layer 4
An electrical pulse indicates that the collision has cleared.
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.

15. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
TCP
An additional broadcast domain will be created.
HTTPS - SMTP - and TFTP

16. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Device Identifiers - Capabilities list - Platform
Telnet and FTP
Data link
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

17. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Certkiller B > trace
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

18. 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?
Duplex mismatch
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
An additional broadcast domain will be created.
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.

19. CDP is running between two CK devices. What information is supplied by CDP?
CertK Switch(config)# ip default-gateway 192.168.1.115
This is an Ethernet port operating at half duplex
Device Identifiers - Capabilities list - Platform
The network layer

20. Which of the following are spanning tree port states?
Data link
Decrease the window size.
Learning - Listening - and Forwarding
HTTPS

21. The Certkiller network administrator needs to a switch named CK1 to become the root bridge for a redundant path switched network. What can be done to ensure that CK1 will always assume the role as the root bridge?
Packet switching - Packet filtering and Internetwork communication.
VTP will allow switches to share VLAN configuration information
An additional broadcast domain will be created.
Configure the switch so that it has lower priority than other switches in the network

22. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Learning - Listening - and Forwarding
All switch and bridge ports are in either the forwarding or blocking state.
802.1Q and ISL
An additional broadcast domain will be created.

23. Which of the following correctly describe steps in the OSI date encapsulation process?
Transport
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Fiber optic cable.
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.

24. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Switches - Bridges - and Routers
Sequence number - Window size - and Acknowledgment number
An electrical pulse indicates that the collision has cleared.

25. Which two of the following values does STP take into consideration when it elects the root bridge?
HTTPS
The Bridgeg ID and The 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
VTP

26. 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 sequence number in the TCP header.
Configure the switch so that it has lower priority than other switches in the network
The network layer
Show arp and Show interface

27. 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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
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
Encapsulations PPP and authentication CHAP

28. 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?
Data link
100 meters
The interfaces must be configured for NAT.
To allow remote management of the switch.

29. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Learning - Listening - and Forwarding
Auto - Desirable - and On

30. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
It operates without collisions and It provides faster data transfer
Auto - On - and Desirable
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

31. 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
Transport
MAC Address and Bridge Priority
The sequence number in the TCP header.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

32. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Increased latency and Filtering of all frame errors
HTTPS - SMTP - and TFTP
Packet switching - Packet filtering and Internetwork communication.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

33. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Decrease the window size.
This is an Ethernet port operating at half duplex
Learning - Listening - and Forwarding
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

34. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Network
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 network layer
STP

35. 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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36. Which of the following devices can the Certkiller network administrator use to segment the LAN?
In an improperly implemented redundant topology
Switches - Bridges - and Routers
The network layer
Congestion avoidance - Windowing and Buffering

37. 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?
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.
Sequence number - Window size - and Acknowledgment number
Show cdp neighbor detail
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.

38. Which three of the protocols below belong to the application layer? (Select three answer choices)
Layer 4
HTTPS - SMTP - and TFTP
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

39. 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
Duplex mismatch
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.
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
Packet switching - Packet filtering and Internetwork communication.

40. Which of the protocols below use TCP at the transport layer?
MAC Address and Bridge Priority
The network layer
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.
SMTP - FTP - HTTP - and HTTPS

41. 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.
Layer 3
Fiber optic cable.
Application
Learning - Listening - and Forwarding

42. Which of the following can lead to the contribution of LAN traffic congestion?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Path selections and Packet switching.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

43. 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?
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.
All switch and bridge ports are in either the forwarding or blocking state.
Certkiller B > trace

44. Which protocol uses TCP port 443 at layer 4?
Congestion avoidance - Windowing and Buffering
HTTPS
Decrease the window size.
Layer 4

45. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
It operates without collisions and It provides faster data transfer
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 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.

46. Which of the following are true of Ethernet technology?
100 meters
Data link
Hosts use a logical bus topology
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.

47. 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?
Encapsulations PPP and authentication CHAP
This is an Ethernet port operating at half duplex
The port is experiencing errors
Network

48. Which of the following services use TCP?
Application
SMTP FTP and HTTP
802.3ab and 802.3z
Congestion avoidance - Windowing and Buffering

49. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Switches increase the number of collision domains in the network.
Fiber optic cable.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

50. 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?
Port security
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Configure the switch so that it has a lower priority than other switches in the network.
A hub and A repeater.