URE 1

Question 1

*What layer of the OSI model defines the electrical, mechanical, procedural, and functional specifications for links btwn communicating ntwk systems?

Answer 1

Physical or Layer 1

Question 2

The IEEE divide the OSI Data Link Layers into what two sublayers?

Answer 2

Logical Link Control (LLC) & Media Access Control (MAC)

Question 3

*At what OSI layer do network switches & bridges operate?

Answer 3

Data Link or Layer 2

Question 4

*At what OSI layer do routers operate?

Answer 4

Network or Layer 3

Question 5

*At what OSI layer are common data compression and encryption schemes used?

Answer 5

Presentation or Layer 6

Question 6

What OSI layer is closest to the end user?

Answer 6

Application or Layer 7

Question 7

What is a formal set of rules and conventions that govern how computers exchange information over a network medium?

Answer 7

Protocol

Question 8

*What topology defines the layout of a network’s devices and media?

Answer 8

Physical

Question 9

*What topology defines the way in which devices communicate and data is transmitted throughout the network?

Answer 9

Logical

Question 10

What topology consists of devices connected to a common, shared cable?

Answer 10

Bus

Question 11

What topology consists of cable segments from each computer connected to a centralized component?

Answer 11

Star

Question 12

What topology combines two or more different physical topologies in a single network?

Answer 12

Hybrid

Question 13

Which network protocol has the DoD chosen as its standard to govern the flow of information?

Answer 13

TCP/IP

Question 14

*What TCP/IP network layer protocol provides the service of matching a known IP address for a destination device to a Media Access Control address?

Answer 14

Address Resolution Protocol (ARP)

Question 15

*What TCP/IP network layer protocol provides the IP address for a device that knows its own MAC address?

Answer 15

Reverse Address resolution Protocol (RARP)

Question 16

*What TCP/IP network layer protocol provides messaging that can help w/ troubleshooting?

Answer 16

Internet Control Message Protocol (ICMP)

Question 17

What TCP/IP transport layer protocol provides reliable data delivery services?

Answer 17

Transmission Control Protocol (TCP)

Question 18

What application w/in TCP/IP is used to send and receive files via TCP?

Answer 18

File Transfer Protocol (FTP)

Question 19

What type of network connects networks that are typically separated by geographical distances btwn cities, states, countries, or around the world?

Answer 19

Wide Area Network (WAN)

Question 20

What type of network makes use of tunneling and security protocols to enable a group of two or more computer systems to communicate over the public Internet?

Answer 20

Virtual Private Network (VPN)

Question 21

Which is a common port that contains Hyper Text Transfer Protocol servers and proxies?

Answer 21

Port 8080

Question 22

How many bits are in an IPv4 address?

Answer 22

32 bits

Question 23

Instead of using binary, how are IPv4 addresses expressed to be more user friendly?

Answer 23

Dotted Decimal Notation

Question 24

*Using a range of 1-126 in the first octet of an IPv4 address, what class does it belong to?

Answer 24

Class A

Question 25

What IPv4 class address is used for networks w/ about 250 nodes?

Answer 25

Class C

Question 26

*What IPv4 class address is used for multicast addressing?

Answer 26

Class D

Question 27

*What IPv4 reserved address is used for loop back?

Answer 27

127.0.0.1

Question 28

*What is a mechanism that allows a network device to divide an IP address into a network and host number?

Answer 28

Subnet mask

Question 29

What is the default classful subnet mask on class B networks?

Answer 29

255.255.0.0

Question 30

*What method borrows bits from the host field of an IP address to create a subnet?

Answer 30

Classless Inter-Domain Routing (CIDR)

Question 31

*Instead of using binary, how are IPv6 addresses expressed to be more user-friendly?

Answer 31

Colon Hexadecimal Format

Question 32

What notation is expressed in leading zero compression for IPv6

Answer 32

1234:1234:0:0:1234:0:0:1234

Question 33

What notation is expressed in zero compression for IPv6?

Answer 33

10AB::3:0:1234:5678

Question 34

What IPv6 Unicast address scope operates w/in a network segment, and will not originate from, or be destined to, an interface that requires a router to direct traffic?

Answer 34

Link-local

Question 35

What IPv6 Unicast address scope is designed to be private, internally routable address that does not route outside the site?

Answer 35

Site-local

Question 36

What IPv6 Unicast address scope is publicly accessible w/ the Network ID portion of the address broken up into different areas allowing for hierarchical design and allocation?

Answer 36

Aggregatable Global