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Test your basic knowledge |
CCNA - 2
Start Test
Study First
Subjects
:
cisco
,
it-skills
,
ccna
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. What layer encapsulates segments into packets?
Network Layer
A. show startup-config b. show running-config
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Destination Network Address
2. What describes the purpose of default route?
A. servers b. routers c. network printers
Transport
Router(config)# interface FastEthernet 0/1
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
3. What is the purpose of resource records in DNS?
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
It provides for the exchange of data over a common local media.
Is used by the server to resolve names.
The MAC protocol can be very simple.
4. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
It reduces unnecessary broadcasts.
A. Physical b. Data Link
Destination is not contacted before a packet is sent.
A. low overhead b. connectionless
5. What are 3 common problems w/ large networks?
A. flow control b. session establishment c. numbering and sequencing
A. hot keys b. context-sensitive c. command syntax check
A. perform degradation b. security issues c. host identification
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
6. 3 measures of data transfer
A. acts as both client and server w/ same communication b. hybrid mode includes a centralized directory of files c. can be used in client-server networks
A. goodput b. throughput c. bandwidth
Supports error detection.
Switch
7. How many bits make up an IPv4 address?
A. addressing b. error detection c. frame delimiting
A. security is difficult to enforce b. if one of the computers is responding to file sharing requests - that computer is functioning as a server
Signal loss can be experienced.
32 bits
8. In business LANs - which connector is used w/ twisted-pair networking cable?
The address of the router that the host will use to 'get to the other side'.
It has expanded adressing capabilities.
RJ-45
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
9. Which combination of keys can be used to interrupt a ping or traceroute process?
A backbone cable.
A. goodput b. throughput c. bandwidth
A. physical layer b. DLL layer
Ctrl + Shift + 6
10. What is the purpose of the preamble in an ethernet frame?
Router
UDP
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. Physical b. Data Link
11. When destination network is not in the routing table - What are 2 actions the router might take?
Network Layer Packet
A. application b. services
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Flash
12. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
Identify processes or services that are communicating with end devices.
DNS
A. the router will discard the packet b. the router will send a time exceeded message to the source host
When connecting a host to a switch.
13. What is a default gateway address?
14. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
SMB
8
2046
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
15. 2 features that make switches preferable to hubs
It has expanded adressing capabilities.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. minimizing of collisions b. division into broadcast domains
A. purpose b. geographic location c. ownership
16. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
80 (HTTP)
IP Protocol
MAC
17. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
UDP
Router(config)# interface FastEthernet 0/1
18. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
Network Layer
Originate data flow.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
19. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
No collisions will occur on this link.
Identify the device that allows local network computers to communicate w/ devices in other networks.
255.255.255.0
Source and Destination Ports
20. Why is flow control used for TCP data transfer?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Network
To prevent the receiver from being overwhelmed by incoming data.
Show Interfaces
21. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
To prevent the receiver from being overwhelmed by incoming data.
When connecting a host to a switch.
Binary ANDing
SSH
22. What event occurs during the 3-way handshake?
A default gateway (router).
RJ-45
TCP initializes the sequence numbers for the sessions.
It provides for the exchange of data over a common local media.
23. What can get you to an outside network?
It does not support encryption.
A. performance degradation b. security issues c. host identification
Wireless
A default gateway (router).
24. When a device is moved from one network to the other...?
A default gateway (router).
Router(config)# interface FastEthernet 0/1
A. servers b. routers c. network printers
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
25. Why are port numbers included in the TCP header of a segment?
Destination is not contacted before a packet is sent.
0 to 1023
Console interface
To enable a receiving host to forward the data to the appropriate application.
26. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Time-to-live (TTL)
Destination Network Address
A. flow control b. session establishment c. numbering and sequencing
They must wait until the first hosts finish transfering the media.
27. 3 statements about the role of routers in the network
DNS
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Network Layer Packet
28. How does the application layer on a server process multiple client requests for services?
It uses support from the lower layers to distinguish between connections to the service.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
FTP
Signal loss can be experienced.
29. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
Show Interfaces
A. larger address space b. data types and classes of service c. authentication and encryption
Destination is not contacted before a packet is sent.
30. 2 most commonly used media types in ethernet networks
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
Create signals that represent the bits in each frame for the media.
A backbone cable.
A. copper UTP b. optical fiber
31. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. flow control b. session establishment c. numbering and sequencing
UDP
Minimal delays in data delivery.
A. decentralized resources b. resource sharing w/o a dedicated server
32. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
A. acts as both client and server w/ same communication b. hybrid mode includes a centralized directory of files c. can be used in client-server networks
Network portion
Physical
33. What are 2 protocols for transfering web resources?
A. purpose b. geographic location c. ownership
A. HTTP b. HTTPS
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. the router will discard the packet b. the router will send a time exceeded message to the source host
34. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
A. replace a switch w/ a router b. subnet the new networks
To prevent the receiver from being overwhelmed by incoming data.
255.255.255.0
35. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
It provides interface between applications on either end of the network.
Supports error detection.
Next-Hop Address
The packets will be delivered and reassembled at destination.
36. 3 functions of the upper data link sublayer in the OSI model
Flash
Binary ANDing
A. non-deterministic b. less overhead c. collisions exist
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
37. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Network address
A. enable mode b. priviledge executive mode
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Network Access
38. What is the proper order of the OSI Layers?
Destination Network Address
Source and Destination Ports
Minimal delays in data delivery.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
39. What device can check for faults - integrity and performance of media?
A. next-hop b. metric/interface c. destination network address
Show Interfaces
OTDR
Network address
40. What determines the method of media access control?
A. media sharing b. logical topology
A physical topology.
Time-to-live (TTL)
A. MTA b. SMTP
41. What is the primary reason for developing IPv6?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
It has expanded adressing capabilities.
Transport
A. non-deterministic b. less overhead c. collisions exist
42. 3 facts about the network portion of an IPv4 address
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
TCP initializes the sequence numbers for the sessions.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Collisions can decrease network performance.
43. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
TCP initializes the sequence numbers for the sessions.
Rollover cable
When connecting a host to a switch.
44. What is PDU?
Router(config)# interface FastEthernet 0/1
Is a layer of specific encapsulation.
A default gateway (router).
A. show startup-config b. show running-config
45. What is a component of a routing table entry?
Next-Hop Address
Network Layer
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
46. 3 features of IPv6
Network Media Control
A. larger address space b. data types and classes of service c. authentication and encryption
Console interface
A. MTA b. SMTP
47. What application layer protocol is used to support file transfers between client and server?
A. non-deterministic b. less overhead c. collisions exist
FTP
Window Size
A. private addresses are blocked from public internet by routers b. the ip address 127.0.0.1 is the loopback - directs traffic to itself
48. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Is a layer of specific encapsulation.
255.255.255.224
A. show startup-config b. show running-config
Hosts return to listen-before-transmit mode.
49. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
Host A
A. perform degradation b. security issues c. host identification
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. enable mode b. priviledge executive mode
50. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
The MAC protocol can be very simple.
2046
A. show startup-config b. show running-config