Test your basic knowledge |

CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
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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. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
802.1Q and ISL
A broadcast address will never be the source address of a frame
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Telnet and FTP

2. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
The interfaces must be configured for NAT.
Path selections and Packet switching.
The switch will forward the frame to a specific port
The network layer

3. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
HTTPS - SMTP - and TFTP
Show arp and Show interface
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Information about a route should never be sent back in the direction from which the original update came.

4. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
It will prevent segment 1's broadcasts from getting to segment 2.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
TCP
Encapsulations PPP and authentication CHAP

5. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
CertK Switch(config)# ip default-gateway 192.168.1.115
STP
The Bridgeg ID and The bridge priority
It operates without collisions and It provides faster data transfer

6. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Layer 4
Network
MAC Address and Bridge Priority
Configure the switch so that it has a lower priority than other switches in the network.

7. 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 network layer
Switches increase the number of collision domains in the network.
This is an Ethernet port operating at half duplex
Application

8. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Certkiller B > trace
A cross-over cable
Information about a route should never be sent back in the direction from which the original update came.
SMTP - FTP - HTTP - and HTTPS

9. What is the purpose of the spanning-tree algorithm in a switched LAN?
MAC Address and Bridge Priority
Switches increase the number of collision domains in the network.
To prevent switching loops in networks with redundant switched paths.
It is used to prevent switching loops in networks with redundant switched routes.

10. 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?
100 meters
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.
Device Identifiers - Capabilities list - Platform
To allow remote management of the switch.

11. 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?
Increased latency and Filtering of all frame errors
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.
Learning - Listening - and Forwarding
It is the sum of the costs based on bandwidth

12. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
It will prevent segment 1's broadcasts from getting to segment 2.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Layer 4
Certkiller B > trace

13. Which of the following services use TCP?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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
SMTP FTP and HTTP

14. 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?
A hub and A repeater.
Sequence number - Window size - and Acknowledgment number
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
ARP and ICMP

15. 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.
Application
Encapsulations PPP and authentication CHAP
A broadcast address will never be the source address of a frame
Auto - Desirable - and On

16. A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role of the Root Bridge?
It is the sum of the costs based on bandwidth
The network layer
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.
Configure the switch so that it has a lower priority than other switches in the network.

17. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
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.
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
Configure the switch so that it has a lower priority than other switches in the network.
The Bridgeg ID and The bridge priority

18. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
VTP will allow switches to share VLAN configuration information
TCP
Port security
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

19. 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.
Fiber optic cable.
Port security
Data link

20. What is the IEEE standard associated with Gigabit Ethernet?
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.
100 meters
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
802.3ab and 802.3z

21. With regard to Ethernet media access methods - which of the following are true?
Certkiller B > trace
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
Data link

22. 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?
STP
Too many hosts in a broadcast domain - 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
VTP

23. 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?
Switches increase the number of collision domains in the network.
Duplex mismatch
Data link
100 meters

24. 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
CertK Switch(config)# ip default-gateway 192.168.1.115
Serial0/1 is down - line protocol is down
Duplex mismatch
The interfaces must be configured for NAT.

25. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
Path selections and Packet switching.
Information about a route should never be sent back in the direction from which the original update came.
Decrease the window size.
Configure the switch so that it has lower priority than other switches in the network

26. Which OSI layer header contains the address of a destination host that is on another network?
Network
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Certkiller B > trace
Layer 4

27. 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.
In an improperly implemented redundant topology
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
It operates without collisions and It provides faster data transfer

28. Which fields are included in the TCP header?
The network layer
The system is malfunctioning.
It is used to prevent switching loops in networks with redundant switched routes.
Source Port - Acknowledgment Number - and Window

29. 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.
The sequence number in the TCP header.
An additional broadcast domain will be created.
The network layer

30. 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.
Layer 3
Information about a route should never be sent back in the direction from which the original update came.
Configure the switch so that it has a lower priority than other switches in the network.

31. Which of the following can lead to the contribution of LAN traffic congestion?
SMTP - FTP - HTTP - and HTTPS
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.
Learning - Listening - and Forwarding

32. 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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33. 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?
802.3ab and 802.3z
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.
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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

34. 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
All switch and bridge ports are in either the forwarding or blocking state.
Fiber optic cable.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.

35. Both the switches and hubs are being utilized within the CK network. Which of the following is true regarding the use of switches and hubs for the network connectivity in this network?
Switches increase the number of collision domains in the network.
The sequence number in the TCP header.
Certkiller B > trace
Congestion avoidance - Windowing and Buffering

36. What are two characteristics of 'store and forward' switching?
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.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Buffering - Cut-through - and Congestion avoidance
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

37. 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
Packet switching - Packet filtering and Internetwork communication.
A cross-over cable
MAC Address and Bridge Priority
Show arp and Show interface

38. Which of the protocols below use TCP at the transport layer?
Congestion avoidance - Windowing and Buffering
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Device Identifiers - Capabilities list - Platform
SMTP - FTP - HTTP - and HTTPS

39. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
The system is malfunctioning.
Learning - Listening - and Forwarding
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
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. 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
Auto - Desirable - and On
HTTPS - SMTP - and TFTP
VLAN and Swtich
This is an Ethernet port operating at half duplex

41. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
Layer 3
Buffering - Cut-through - and Congestion avoidance
TCP

42. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Duplex mismatch
All switch and bridge ports are in either the forwarding or blocking state.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

43. 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)
It is used to prevent switching loops in networks with redundant switched routes.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Path selections and Packet switching.
Application

44. 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
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 and HTTP
The switch will forward the frame to a specific port

45. 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?
SMTP FTP and HTTP
ARP and ICMP
This is an Ethernet port operating at half duplex
Data link

46. 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?
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.
ARP and ICMP
Application
CertK Switch(config)# ip default-gateway 192.168.1.115

47. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Switches increase the number of collision domains in the network.
Packet switching - Packet filtering and Internetwork communication.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

48. 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?
Certkiller B > trace
Device Identifiers - Capabilities list - Platform
Sequence number - Window size - and Acknowledgment number
Configure the switch so that it has lower priority than other switches in the network

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?
The switch will forward the frame to a specific port
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The interfaces must be configured for NAT.
MAC Address and Bridge Priority

50. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Configure the switch so that it has a lower priority than other switches in the network.
CertK Switch(config)# ip default-gateway 192.168.1.115
VTP will allow switches to share VLAN configuration information
Switches - Bridges - and Routers

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