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

2. What are two forms of application layer software?
applications
syntax

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

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

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

6. 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

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

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

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

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

11. 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

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

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

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

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

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

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

18. 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

19. 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.

20. 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 the service

TEST IS ABOVE 90%

1. Which two layers of the OSI model have the same functions as the TCP/IP model Network Access Layer? (Choose two.)
Network
Transport
Physical**
Data Link**
Session

2. What is a primary function of the trailer information added by the data link layer encapsulation?
supports error detection**
ensures ordered arrival of data
provides delivery to correct destination
identifies the devices on the local network
assists intermediary devices with processing and path selection

3. During the encapsulation process, what occurs at the data link layer?
No address is added.
The logical address is added.
The physical address is added.**
The process port number is added.

4. What device is considered an intermediary device?
file server
IP phone
laptop
printer
switch**

5. Which layer encapsulates the segment into packets?
physical
data link**
network
transport

6. Which statements correctly identify the role of intermediary devices in the network? (Choose three.)
determine pathways for data**
initiate data communications
retime and retransmit data signals**
originate the flow of data
manage data flows**
final termination point for data flow

7. What can be identified by examining the network layer header?
the destination device on the local media
the path to use to reach the destination host**
the bits that will be transferred over the media
the source application or process creating the data

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

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

10. What are the key functions of encapsulation? (Choose three.)
allows modification of the original data before transmission
identifies pieces of data as part of the same communication**
enables consistent network paths for communication
ensures that data pieces can be directed to the correct receiving end device**
enables the reassembly of complete messages**
tracks delay between end devices

11. Refer to the exhibit. Which networking term describes the data interleaving process represented in the graphic?
piping
PDU
streaming
multiplexing
**encapsulation

12. What is a PDU?
corruption of a frame during transmission
data reassembled at the destination
retransmitted packets due to lost communication
**a layer specific encapsulation

13. 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?”
the destination device
**an end device
an intermediate device
a media device

14. Refer to the exhibit. Which set of devices contains only end devices?
A, C, D
B, E, G, H
C, D, G, H, I, J
D, E, F, H, I, J
**E, F, H, I, J

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

16. 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.
The connection between segments in the LAN is usually through a leased connection.
The security and access control of the network are controlled by a service provider.
**A LAN provides network services and access to applications for users within a common organization.
Each end of the network is generally connected to a Telecommunication Service Provider (TSP).

17. Refer to the exhibit. What type of network is shown?
WAN
MAN
**LAN
WLAN

18. What is the purpose of the TCP/IP Network Access layer?
path determination and packet switching
**data representation, encoding, and control
reliability, flow control, and error detection
detailing the components that make up the physical link and how to access it
the division of segments into packets

19. Which characteristic correctly refers to end devices in a network?
manage data flows
originate data flow
**retime and retransmit data signals
determine pathways for data

20. What is the primary purpose of Layer 4 port assignment?
to identify devices on the local media
to identify the hops between source and destination
to identify to the intermediary devices the best path through the network
to identify the source and destination end devices that are communicating
**to identify the processes or services that are communicating within the end devices

21. Select the statements that are correct concerning network protocols. (Choose three.)
**define the structure of layer specific PDU’s
dictate how to accomplish layer functions
**outline the functions necessary for communications between layers
limit hardware compatibility
**require layer dependent encapsulations
eliminate standardization among vendors

TEST IS ABOVE 90%

This PHP blog system is not very easy to control, finally, it can run very well~haha

1 How many bits make up an IPv4 address?
128
64
48
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?
255.255.255.248
255.255.255.224
255.255.255.192 **
255.255.255.240
255.255.255.128
255.255.255.252

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: 255.255.255.240 default gateway: 192.168.10.39
IP address: 192.168.10.38 subnet mask: 255.255.255.240 default gateway: 192.168.10.33
IP address: 192.168.10.38 subnet mask: 255.255.255.248 default gateway: 192.168.10.33 **
IP address: 192.168.10.39 subnet mask: 255.255.255.248 default gateway: 192.168.10.31
IP address: 192.168.10.254 subnet mask: 255.255.255.0 default gateway: 192.168.10.1

4 Refer to the exhibit. Which network prefix will work with the IP addressing scheme shown in the graphic.
/24
/16
/20
/27 **
/25
/28

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?
The router has an incorrect gateway.
Host A has an overlapping network address.
Host A has an incorrect default gateway configured.
Host A has an incorrect subnet mask.
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?
255.255.0.0
255.255.255.0 **
255.255.254.0
255.255.248.0

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 useable host address.
This is a broadcast address.
This is a network address. **
This is not a valid address.

8 What three facts are true about the network portion of an IPv4 address? (Choose three.)
identifies an individual device
is identical for all hosts in a broadcast domain**
is altered as packet is forwarded
varies in length **
is used to forward packets **
uses flat addressing

9 What is the network address of the host 172.25.67.99 /23 in binary?
10101100. 00011001.01000011.00000000
10101100. 00011001.01000011.11111111
10101100. 00011001.01000010.00000000 **
10101100. 00011001.01000010.01100011
10101100. 00010001.01000011. 01100010
10101100. 00011001.00000000.00000000

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?
172.16.0.0
172.16.192.0
172.16.192.128
172.16.192.160 **
172.16.192.168
172.16.192.176

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.
Internet Protocol is not properly installed on the host.**
There is a problem at the physical or data link layer.
The default gateway device is not operating.
A router on the path to the destination host has gone down.

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 discard the packet.**
The router will decrement the TTL value and forward the packet to the next router on the path to the destination host.
The router will send a time exceeded message to the source host. **
The router will increment the TTL value and forward the packet to the next router on the path to the destination 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.)
192.168.22.40 255.255.255.248
192.168.22.40 255.255.255.252
192.168.22.100 255.255.255.128
192.168.22.100 255.255.255.254 **
192.168.22.1 255.255.255.192 **
192.168.22.101 255.255.255.224

14 Which of the following are features of IPv6? (Choose three.)
larger address space **
faster routing protocols
data types and classes of service **
authentication and encryption **
improved host naming conventions
same addressing scheme as IPv4

15 Which process do routers use to determine the subnet network address based upon a given IP address and subnet mask?
binary adding
hexadecimal anding
binary division
binary multiplication
binary ANDing **

16 What is the primary reason for development of IPv6?
security
header format simplification
expanded addressing capabilities **
addressing simplification

17 Which three IP addresses are private? (Choose three.)
172.168.33.1
10.35.66.70 **
192.168.99.5 **
172.18.88.90 **
192.33.55.89
172.35.16.5

18 Which statements are true regarding IP addressing? (Choose two.)
NAT translates public addresses to private addresses destined for the Internet.
Only one company is allowed to use a specific private network address space.
Private addresses are blocked from public Internet by router. **
Network 172.32.0.0 is part of the private address space.
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.)
172.16.4.127 /26
172.16.4.155 /26 **
172.16.4.193 /26 **
172.16.4.95 /27
172.16.4.159 /27
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?
an internet
a network **
an octet
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 host subnet mask is incorrect.
The default gateway is a network address.
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.)
LAN workstations
servers **
network printers **
routers **
remote workstations
laptops