Module 2 Question and answers correctly solved Module 3: Protocols and Models
"How" to communicate - correct answer Networks can vary in size and complexity. It is not enough to have a connection devices must agree on "how" communicate
There are three elements to any communication: - corr...
Module 3: Protocols and Models
"How" to communicate - correct answer ✔Networks can vary in size and
complexity. It is not enough to have a connection devices must agree on
"how" communicate
There are three elements to any communication: - correct answer ✔- There
will be a source (sender)
- There will be a destination (receiver)
- There will be a channel (media) that provides for the path of communications
to occur
Communications Protocols - correct answer ✔All communications are
governed by protocols
Protocols - correct answer ✔- Rules that communications will follow
- These rules will vary depending on the protocol
Rule Estabilishment - correct answer ✔Individuals must use established
rules or agreements to govern the conversation
Protocols must account for the following requirements - correct answer ✔-
An identified sender and receiver
- Common language and grammar
- Speed and timing of delivery
- Confirmation or acknowledgment requirements
,Common computer protocols must be in agreement and include the following
requirements: - correct answer ✔- Message encoding
- Message formatting and encapsulation
- Message size
- Message timing
- Message delivery options
Message Encoding - correct answer ✔- The process of converting
information into another acceptable form for transmission
- Decoding reverses this process to interpret the information
Message Formatting and Encapsulation - correct answer ✔When a message
is sent, it must use a specific format or structure
Message Formats - correct answer ✔Depends on the type of message and
the channel that is used to deliver the message
Encoding and Message Size - correct answer ✔- Encoding between hosts
must be in an appropriate format for the medium
- Messages sent across the network are converted to bits
- Bits are encoded into a pattern of light, sound, or electrical impulses
- The destination host must decode the signals to interpret the message
Message Timing - correct answer ✔Includes the following:
- Flow Control
- Response Timeout
- Access method
, Message Timing - Flow Control - correct answer ✔Manages the rate of data
transmission and defines how much information can be sent and the speed at
which it can be delivered
Message Timing - Response Timeout - correct answer ✔Manages how long
a device waits when it does not hear a reply from the destination
Message Timing - Access method - correct answer ✔Determines when
someone can send a message
Message Timing - Access Method: Rules - correct answer ✔There may be
various rules governing issues like "collisions". This is when more than one
device sends traffic at the same time and the messages become corrupt
Message Timing - Access Method: Protocols - correct answer ✔Some
protocols are proactive and attempt to prevent collisions; other protocols are
reactive and establish a recovery method after the collision occurs
Message Delivery Options - correct answer ✔- Unicast: one to one
communication
- Multicast: one to many, typically not all
- Broadcast: one to all
Broadcasts - correct answer ✔Used in IPv4 networks, but are not an option
for IPv6. Later we will also see "Anycast" as an additional delivery option for
IPv6
Node Icon - correct answer ✔Documents may use the node icon, typically a
circle, to represent all devices
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