iPhone Distributor dan Isi Ulang Paket Data Internet

4/27/2009

CCNA 1 Chapter 2-7

CHAPTER 2

Which two layers of the OSI model have the same functions as the TCP/IP model Network Access Layer? (Choose two.)
Physical**
Data Link**
What is a primary function of the trailer information added by the data link layer encapsulation?
supports error detection**

During the encapsulation process, what occurs at the data link layer?
The physical address is added.**

What device is considered an intermediary device?
switch**

Which layer encapsulates the segment into packets?
data link**

Which statements correctly identify the role of intermediary devices in the network? (Choose three.)
determine pathways for data**
retime and retransmit data signals**
manage data flows**

What can be identified by examining the network layer header?
the path to use to reach the destination host**

What is the proper order of the layers of the OSI model from the highest layer to the lowest layer?
application, presentation, session, transport, network, data link, physical**

Refer to the exhibit. Which three labels correctly identify the network types for the network segments that are shown? (Choose three.)
Network B -- WAN**
Network C -- LAN**
Network A -- LAN**

What are the key functions of encapsulation? (Choose three.)
identifies pieces of data as part of the same communication**
ensures that data pieces can be directed to the correct receiving end device**
enables the reassembly of complete messages**

Refer to the exhibit. Which networking term describes the data interleaving process represented in the graphic?
**encapsulation

What is a PDU?
**a layer specific encapsulation

Refer to the exhibit. "Cell A" at IP address 10.0.0.34 has established an IP session with "IP Phone 1" at IP address 172.16.1.103. Based upon the graphic, which device type best describes the function of wireless device "Cell A?"
**an end device

Refer to the exhibit. Which set of devices contains only end devices?
**E, F, H, I, J

Refer to the exhibit. Which term correctly identifies the device type that is included in the green area?
**intermediary

Which three statements best describe a Local Area Network (LAN)? (Choose three.)
**A LAN is usually in a single geographical area.
**The network is administered by a single organization.
**A LAN provides network services and access to applications for users within a common organization.

Refer to the exhibit. What type of network is shown?
**LAN

What is the purpose of the TCP/IP Network Access layer?
**detailing the components that make up the physical link and how to access it

Which characteristic correctly refers to end devices in a network?
**retime and retransmit data signals

What is the primary purpose of Layer 4 port assignment?
**to identify the processes or services that are communicating within the end devices

Select the statements that are correct concerning network protocols. (Choose three.)
**define the structure of layer specific PDU's
**outline the functions necessary for communications between layers
**require layer dependent encapsulations

CHAPTER 3

What is the purpose of resource records in DNS?
used by the server to resolve names

What are two forms of application layer software?
applications
syntax

What application layer protocol is commonly used to support for file transfers between a client and a server?
FTP

What are two characteristics of peer-to-peer networks?
decentralized resources
resource sharing without a dedicated server

Which layer of the OSI model supplies services that allow user to interface with the network?
application

What are three properties of peer-to-peer applications?
acts as both a client and server within the same communication
hybrid mode includes a centralized directory of files
does not require specialized software

What is the role of the OSI application layer?
provides the interface between the applications on either end of the network

What three protocols operate at the Application layer of the OSI model?
DNS, SMTP, POP

Which email components are used to forward mail between servers?
MDA, MTA

Which two protocols are used to control the transfer of web resources from a web server to a client browser?
HTTPS
HTTP

Which statements are correct concerning the role of the MTA in handling email?
receives email from the client's MUA
passes email to the MDA for final delivery
uses SMTP to route email between servers

As compared to SSH, what is the primary disadvantage of telnet?
does not support encryption

Which application layer protocols correctly match a corresponding function?
DNS dynamically allocates IP addresses to hosts
Telnet provides a virtual connection for remote access

What is the automated service that matches resource names with the required IP address?
DNS

Refer to the exhibit. What is the destination port for the communication that is represented on line 5?
80

What are two characteristics of clients in data networks?
initiate data exchanges
may upload data to servers

What application layer protocol describes the services that are used for file sharing in Microsoft networks?
SMB

A network administrator is designing a network for a new branch office of twenty-five users. What are the advantages of using a client-server model?
centralized administration
security is easier to enforce

A small home network has been installed to interconnect three computers together for gaming and file sharing. What two properties represent this network type?
User accounts are centralized.
Security is difficult to enforce.

How does the application layer on a server usually process multiple client request for services?
uses support from lower layer functions to distinguish between connections to th

CHAPTER 4


Refer to the exhibit. What two pieces of information can be determined from the output that is shown? (Choose two.)
**A termination request has been sent to 192.135.250.10.
**The local computer is accepting HTTP requests.

After a web browser makes a request to a web server that is listening to the standard port, what will be the source port number in the TCP header of the response from the server?
**80

Which information is found in both the TCP and UDP header information?
**acknowledgments

Which is an important characteristic of UDP?
**minimal delays in data delivery

Refer to the exhibit. Host A is using FTP to download a large file from Server 1. During the download process, Server 1 does not receive an acknowledgment from Host A for several bytes of transferred data. What action will Server 1 take as a result?
**reach a timeout and resend the data that needs to be acknowledged

Refer to the exhibit. In line 7 of this Wireshark capture, what TCP operation is being performed?
**session establishment

Refer to the exhibit. The initial TCP exchange of data between two hosts is shown in the exhibit. Assuming an initial sequence number of 0, what sequence number will be included in Acknowledgment 2 if Segment 6 is lost?
**1850

Why is flow control used for TCP data transfer?
**to prevent the receiver from being overwhelmed by incoming data

During a TCP communication session, if the packets arrive to the destination out of order, what will happen to the original message?
**The packets will be delivered and reassembled at the destination.

With TCP/IP data encapsulation, which range of port numbers identifies all well-known applications?
**0 to 1023

Which transport layer protocol provides low overhead and would be used for applications which do not require reliable data delivery?
**UDP

What are two features of the User Datagram Protocol (UDP)? (Choose two.)
**flow control
**low overhead

What mechanism is used by TCP to provide flow control as segments travel from source to destination?
**window size

What is dynamically selected by the source host when forwarding data?
**source port

Why are port numbers included in the TCP header of a segment?
**to enable a receiving host to forward the data to the appropriate application

Which two options represent Layer 4 addressing? (Choose two.)
**identifies source and destination hosts
**identifies multiple conversations between the hosts

Which three features allow TCP to reliably and accurately track the transmission of data from source to destination?
**encapsulation
**session establishment
**numbering and sequencing

Which OSI model layer is responsible for regulating the flow of information from source to destination, reliably and accurately?
**transport

Based on the transport layer header shown in the diagram, which of the following statements describe the established session? (Choose two.)
**This contains a Telnet request.
**This is a TCP header.

Which event occurs during the transport layer three-way handshake?
**UDP establishes the maximum number of bytes to be sent.


CHAPTER 5

In an IPv4 environment, what information is used by the router to forward data packets from one interface of a router to another?
**destination network address

What information is added during encapsulation at OSI Layer 3?
**source and destination IP address

In a connectionless system, which of the following is correct?
**The destination is not contacted before a packet is sent.

Which IP packet field will prevent endless loops?
**time-to-live

Which portion of the network layer address does a router use to forward packets?
**network portion

Refer to the exhibit. Using the network in the exhibit, what would be the default gateway address for host A in the 192.133.219.0 network?
**192.133.219.1

If the default gateway is configured incorrectly on the host, what is the impact on communications?
**The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.

What is the purpose of a default gateway?
**identifies the device that allows local network computers to communicate with devices on other networks

What type of routing uses information that is manually entered into the routing table?
**static

When the destination network is not listed in the routing table of a Cisco router, what are two possible actions that the router might take? (Choose two.)
**The router sends an ARP request to determine the required next hop address.
**The router forwards the packet to the interface indicated by the source address.

What are the key factors to consider when grouping hosts into a common network? (Choose three.)
**gateways
**geographic location
**ownership

What is a component of a routing table entry?
**the next-hop address

Which intermediary devices could be used to implement security between networks? (Choose two.)
**router
**firewall

What are three common problems with a large network? (Choose three.)
**performance degradation
**security issues
**limited management responsibility

Refer to the exhibit. All devices shown in the exhibit have factory default settings. How many broadcast domains are represented in the topology that is shown?
**4

Which three statements are true about routes and their use? (Choose three.)
**If multiple network entries exist for the destination network, the most general route is used to forward the packet.
**If no route exists for the destination network and a default route is present, the packet is forwarded to the next-hop router.
**If the originating host has a default gateway configured, the packet for a remote network can be forwarded using that route.

Refer to the exhibit. A network administrator is troubleshooting a connectivity problem and needs to determine the address that is used to forward network packets out the network. Using the netstat -r command, the administrator would identify which address as the address to which all hosts send packets that are destined for an outside network?
**10.10.10.6

Refer to the exhibit. A network administrator notices that there are too many broadcasts on the network. What two steps can the network administrator take to resolve this problem? (Choose two.)
**Replace S2 with a router.
**Subnet the 192.168.0.0 /24 network.

Refer to the exhibit. The network in the exhibit is fully operational. What two statements correctly describe the routing for the topology that is shown? (Choose two.)
**192.168.0.2 is the next-hop address that is used by R3 to route a packet from the 10.0.0.0 **192.168.0.1 is the next-hop address that is used by R1 to route a packet from the ....

What two characteristics are commonly associated with dynamic routing protocols? (Choose two.)
**provide routers with up-to-date routing tables
**prevent manual configuration and maintenance of the routing table

What statement describes the purpose of a default route?
**A host uses a default route to transfer data to a host outside the local network when no other route to the destination exists.

CHAPTER 6

1. How many bits make up an IPv4 address?
32

2. Refer to the exhibit. A network administrator has to develop an IP addressing scheme that uses the 192.168.1.0 /24 address space. The network that contains the serial link has already been addressed out of a separate range. Each network will be allocated the same number of host addresses. Which network mask will be appropriate to address the remaining networks?
255.255.255.192

3. Refer to the exhibit. The network administrator has assigned the internetwork of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 mask. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the workgroup server's properties to allow connectivity to the network?
IP address: 192.168.10.38 subnet mask: 255.255.255.248 default gateway: 192.168.10.33

4. Refer to the exhibit. Which network prefix will work with the IP addressing scheme shown in the graphic.
/27

5. Refer to the exhibit. A network administrator discovers that host A is having trouble with Internet connectivity, but the server farm has full connectivity. In addition, host A has full connectivity to the server farm. What is a possible cause of this problem?
NAT is required for the host A network.

6. What subnet mask would a network administrator assign to a network address of 172.30.1.0 if it were possible to have up to 254 hosts?
255.255.255.0

7. Given the IP address and subnet mask of 172.16.134.64 255.255.255.224, which of the following would describe this address?
This is a network address.

8. What three facts are true about the network portion of an IPv4 address? (Choose three.)
is altered as packet is forwarded
varies in length
is used to forward packets

9. What is the network address of the host 172.25.67.99 /23 in binary?
10101100. 00011001.01000010.00000000

10. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
172.16.192.160

11. Refer to the exhibit. Why would the response shown be displayed after issuing the command ping 127.0.0.1 on a PC?
The IP settings are not properly configured on the host.

12. What two things will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away? (Choose two.)
The router will send a time exceeded message to the source host.
The router will send an ICMP Redirect Message to the source host.

13. Refer to the exhibit. An administrator is designing security rules for the 192.168.22.0 /24 network. Each security rule requires an address and mask pair to represent the machines that will be affected by the rule. Which two address and mask pairs will be the most precise way to reference the servers and hosts separately. (Choose two.)
192.168.22.100 255.255.255.254
192.168.22.1 255.255.255.192

14. Which of the following are features of IPv6? (Choose three.)
larger address space
data types and classes of service
authentication and encryption

15. Which process do routers use to determine the subnet network address based upon a given IP address and subnet mask?
binary ANDing

16. What is the primary reason for development of IPv6?
expanded addressing capabilities

17. Which three IP addresses are private? (Choose three.)
10.35.66.70
192.168.99.5
172.18.88.90

18. Which statements are true regarding IP addressing? (Choose two.)
Private addresses are blocked from public Internet by router.
IP address 127.0.0.1 can be used for a host to direct traffic to itself.

19. Which IPv4 subnetted addresses represent valid host addresses? (Choose three.)
172.16.4.155 /26
172.16.4.193 /26
172.16.4.207 /27

20. What is a group of hosts called that have identical bit patterns in the high order bits of their addresses?
a network
a radi

21. Refer to the exhibit. Host A is connected to the LAN, but it cannot get access to any resources on the Internet. The configuration of the host is shown in the exhibit. What could be the cause of the problem?
The default gateway is a broadcast address.
The default gateway is on a different subnet from the host.

22. Which of the following network devices are recommended to be assigned static IP addresses? (Choose three.)
servers
network printers
routers

CHAPTER 7

1. Which options are properties of contention-based media access for a shared media? (Choose three.)
**non-deterministic
**less overhead
**collisions exist

2. What is a primary purpose of encapsulating packets into frames?
**facilitate the entry and exit of data on media

3. Refer to the exhibit. How many unique CRC calculations will take place as traffic routes from the PC to the laptop?
**2

4. What is true concerning physical and logical topologies?
**Logical topologies consist of virtual connections between nodes.

5. Refer to the exhibit. Assuming that the network in the exhibit is converged meaning the routing tables and ARP tables are complete, which MAC address will Host A place in the destination address field of Ethernet frames destined for www.server?
**00-0c-85-cf-65-c0

6. What are three characteristics of valid Ethernet Layer 2 addresses? (Choose three.)
**They are 48 binary bits in length.
**They are generally represented in hexadecimal format.
**They must be changed when an Ethernet device is added or moved within the network.

7. Refer to the exhibit. A frame is being sent from the PC to the laptop. Which source MAC and IP addresses will be included in the frame as it leaves RouterB? (Choose two.)
**source MAC - Fa0/1 on RouterB
**source IP - PC

8. What determines the method of media access control? (Choose two.)
**media sharing
**logical topology

9. What is the purpose of the preamble in an Ethernet frame?
**is used for timing synchronization with alternating patterns of ones and zeros

10. What statements are true regarding addresses found at each layer of the OSI model? (Choose two.)
**Layer 2 may identify devices by a physical address burned into the network card
**Layer 3 represents a hierarchical addressing scheme

11. Which statements describe the logical token-passing topology? (Choose two.)
**Computers are allowed to transmit data only when they possess a token.
**Electronic tokens are passed sequentially to each other.

12. Which sublayer of the data link layer prepares a signal to be transmitted at the physical layer?
**MAC

13. What is true regarding media access control? (Choose three.)
**Ethernet utilizes CSMA/CD
**defined as placement of data frames on the media
**Data Link layer protocols define the rules for access to different media

14. What is a characteristic of a logical point-to-point topology?
**The media access control protocol can be very simple.

15. What two facts are true when a device is moved from one network or subnet to another? (Choose two.)
**The device will still operate at the same Layer 2 address.
**The Layer 3 address must be reassigned to allow communications to the new network.

16. What is a function of the data link layer?
**provides for the exchange data over a common local media

17. Which three factors should be considered when implementing a Layer 2 protocol in a network? (Choose three.)
**the geographic scope of the network
**the physical layer implementation
**the number of hosts to be interconnected

18. What is the primary purpose of the trailer in a data link layer frame?
**support frame error detection

19. A network administrator has been asked to provide a graphic representation of exactly where the company network wiring and equipment are located in the building. What is this type of drawing?
**physical topology

Refer to the exhibit. Which statement describes the media access control methods that are used by the networks in the exhibit?
**Network 1 uses CSMA/CD and Network 3 uses CSMA/CA.

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1 comment:

  1. makasih mas, aku dapat lolos dari chapter 2 s.d 7.
    Ini ada yang baru chapter 8 sampai habis. Di upload lagi ya...,makasih sekali lagi.
    Salam P.Joko

    ReplyDelete

Silahkan Masukkan Saran Anda,,thanks :-)