3 Protocols and Models

Question 1

Message encoding

Answer 1

Encoding is the process of converting information into another acceptable form, for transmission.

Question 2

Message formatting and encapsulation

Answer 2

Converting message to specific format or structure which depends on the type of message and the channel that is used to deliver the message.

Question 3

Common computer protocol requierments

Answer 3

Message encoding
Message formatting and encapsulation
Message size
Message timing
Message delivery options

Question 4

Message timing

Answer 4

Flow Control - process of managing the rate of data transmission
Response Timeout - response waiting time and further actions based on protocols
Access method - defines when someone can send a message ( collisions )

Question 5

Message delivery options

Answer 5

Unicast - one reciver
Multicast - multiple recivers
Broadcast - all avliable recivers

Question 6

Network Communications Protocols

Answer 6

Enable two or more devices to communicate over one or more networks
-IP
-Transmission Control Protocol (TCP)
-HyperText Transfer Protocol (HTTP)

Question 7

Network Security Protocols

Answer 7

Secure data to provide authentication, data integrity, and data encryption
-Secure Shell (SSH)
-Secure Sockets Layer (SSL)
-Transport Layer Security (TLS)

Question 8

Routing Protocols

Answer 8

Enable routers to exchange route information, compare path information, and then to select the best path to the destination network
- Open Shortest Path First (OSPF)
- Border Gateway Protocol (BGP)

Question 9

Service Discovery Protocols

Answer 9

For the automatic detection of devices or services
-Dynamic Host Configuration Protocol (DHCP)
-Domain Name System (DNS)

Question 10

Network protocol functions : Addressing

Answer 10

Identifies the sender and the intended receiver of the message
-Ethernet
-IPv4
-IPv6

Question 11

Network protocol functions : Reliability

Answer 11

Provides guaranteed delivery mechanisms in case messages are lost or corrupted in transit
-TCP

Question 12

Network protocol functions : Flow control

Answer 12

Ensures that data flows at an efficient rate between two communicating devices
-TCP

Question 13

Network protocol functions : Sequencing

Answer 13

Uniquely labels each transmitted segment of data
-TCP

Question 14

Network protocol functions : Error Detection

Answer 14

Used to determine if data became corrupted during transmission
-Ethernet
-IPv4
-IPv6
-TCP

Question 15

Network protocol functions : Application Interface

Answer 15

Contains information used for process-to-process communications between network applications
-HTTP or HTTPS

Question 16

HTTP - hypertext transfer protocol

Answer 16

Governs the way web server and web client interact. It defines the content and formatting of the requests and responses that are exchanged between client and server

Question 17

TCP - transmission control protocol

Answer 17

Provides reliable delivery of information and managing flow control between end devices

Question 18

IP - Internet Protocol

Answer 18

Responsible for delivering messages from the sender to reciver

Question 19

Application Layer : DNS - Domain Name System

Answer 19

Translates domain names such as cisco.com, into IP addresses

Question 20

Ethernet

Answer 20

Responsible for delivery of messages from one NIC to another NIC

Question 21

Application Layer : DHCPv4, DHCPv6

Answer 21

Dynamically assigns IPv4/IPv6 addressing information to DHCPv4/DHCPv6 clients at start-up

Question 22

Application Layer : SLAAC - Stateless Address Autoconfiguration

Answer 22

Allows a device to obtain its IPv6 addressing information without using a DHCPv6 server