Day 3 OSI model Tcp/IP suite

Open Systems Interconnection

"What does 'OSI' stand for?"

layer 7 application

Which layer of the OSI model interacts with software applications on a computer?

layer 7 application

Which layer of the OSI model includes HTTP and HTTPS?

layer 7 application

Which layer of the OSI model identifies communication partners and synchronizes communication?

encapsulation

The process of adding additional headers and trailers to data before it is sent over the network is called [...]

de-encapsulation

The process of removing headers and trailers from data received over a network is called [...]

same layer

Interaction between the same OSI layer on different devices is called [...] interaction.

adjacent layer

Interaction between the different OSI layers on the same device is called [...] interaction.

layer 6 presentation

Which layer of the OSI model translates between data formats?

layer 5 session

Which layer of the OSI model establishes, manages, and terminates connections between the local and remote applications?

layer 4 transport

Which layer of the OSI model segments and reassembles data for communications between end hosts?

layer 4 transport

Which layer of the OSI model provides host-to-host communication?

7 protocols (application)

HTTP and HTTPS are layer

layer 7 application

Which layer of the OSI model provides process-to-process communication?

segment

What is the name of the Layer 4 PDU?

layer 3 network

Which layer of the OSI model provides path selection between source and destination?

3 - Network

Routers operate at Layer [...] of the OSI model.

layer 3 network

Which layer of the OSI model provides logical addressing (IP addresses)?

layer 3- network

Which layer of the OSI model provides connectivity to end hosts on different networks?

packet

What is the name of the Layer 3 PDU?

layer 3 PDU

Packet

Layer 4 PDU

Segment

Frame

What is the name of the Layer 2 PDU?

layer 2 PDU

Frame

layer 2 data link

Which layer of the OSI model provides node-to-node connectivity?

layer 2 data link

Which layer of the OSI model detects and corrects Physical layer errors?

2

Switches operate at Layer [...] of the OSI model.

layer 1 - physical

Which layer of the OSI model defines physical characteristics of the medium used to transfer data between devices?

bits

What is the name of the Layer 1 PDU?

7. Application

6. Presentation

5. Session

4. Transport

3. Network

2. Data Link

1. Physical

List the layers of the OSI model in order:

TCP/IP suite

Which networking model was developed by the United States Department of Defense?

TCP/IP

Which networking model is in use in modern networks?

Application, Presentation, Session

OSI Model [...] Layer(s) = TCP/IP Application Layer

Transport

OSI Model [...] Layer(s) = TCP/IP Transport Layer

network

OSI Model [...] Layer(s) = TCP/IP Internet Layer

Data Link and Physical

OSI Model [...] Layer(s) = TCP/IP Link Layer

application

OSI Model Application, Presentation, Session Layers = TCP/IP [...] Layer

transport

OSI Model Transport Layer = TCP/IP [...] Layer

internet

OSI Model Network Layer = TCP/IP [...] Layer

link

OSI Model Data Link, Physical Layers = TCP/IP [...] Layer

Prepared and sent to the bottom, layer 4 adds a header

top 3 layers of OSI model

Layer 4

breaks large data into segment's and

reassemble's the data

Host to Host communication, end to end

Transport layer

is called a segment

Data from top 3 layers + layer 4 header

is called a packet

Data from top 3 layers + l4 header + l3 header

is called a frame

Data from top 3 layers + l4 header + l3 header + l2 trailer + l2 header

It is the reverse process of removing the added information, as data passes to the next higher layer at the receiver end.

De encapsulation

OSI vs. TCP/IP

Application, Transport, Internet, Link

TCP/IP Model Layers

Same layer interaction

HTTP data sent from a YouTube web server is displayed via your web browser. This is an example of what?

Frame

HTTP data has been encapsulated with three separate headers and one trailer. What is the appropriate name for this PDU

transport, network, data link, physical

Which layers of the OSI model are most relevant to the role of a network engineer

Data link and physical

The link layer of the TCP/IP model is equivalent to what layer or layers, of the osi model

transport

which layer of the OSI model provides host to host communications

UDP/TCP

Which of the following are examples of TCP/IP transport layer protocols

ethernet and PPP

Which of the following protocols are examples of TCP/IP data link layer protocols

adjacent layer interaction

The process of HTTP asking TCP to send some data and making sure that it is received correctly is an example of what?

same-layer interaction

The process of TCP on one computer marking a TCP segment as segment 1, and the receiving computer then acknowledging the receipt of TCP segment 1 is an example of what?

data encapsulation

The process of a web server adding a TCP header to the contents of a web page, followed by adding an IP header, and then adding a data link header and trailer is an example of what?

frame

Which of the following terms is used specifically to identify the entity created when encapsulating data inside data-link layer headers and trailers?

layer 2 PDU

Which OSI encapsulation term can be used instead of the term frame?

A protocol that works on the Data Link layer of the TCP/IP protocol suite, PPP is used to send IP datagrams over serial point-to-point links. PPP can be used in synchronous and asynchronous

connections and can dynamically configure and test remote network connections.

PPP (Point-to-Point Protocol)

HTTP, POP3, SMTP

TCP/IP application layer examples

TCP/UDP

TCP/IP transport layer examples

IP, ICMP

TCP/IP network layer examples

ethernet, 802.11 (wifi)

TCP/IP Data-Link & Physical layer examples

7. Protocol

DHCP is a layer