IOT & M2M Protocols: Protocol Functions and OSI Model

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Questions and Answers

Which protocol function aims to reduce duplication of effort and may have the same type of function in protocols at different levels?

  • Flow control
  • Encapsulation (correct)
  • Fragmentation
  • Connection control

In which layer of the OSI model does hop-to-hop delivery occur?

  • Session layer
  • Transport layer
  • Network layer (correct)
  • Data link layer

How many layers were originally defined in the TCP/IP protocol suite?

  • Four (correct)
  • Five
  • Two
  • Three

Which layer in the TCP/IP protocol suite is equivalent to the OSI model's transport layer?

<p>Transport (B)</p> Signup and view all the answers

What is the aim of the OSI model's presentation layer?

<p>Translation, compression, and encryption of data (A)</p> Signup and view all the answers

Which TCP/IP layer is responsible for network access?

<p>Network access (C)</p> Signup and view all the answers

Which layer of the TCP/IP model is responsible for connection-oriented transmission?

<p>Transport Layer (B)</p> Signup and view all the answers

What type of addressing is used in most local-area networks for physical addresses?

<p>48-bit hexadecimal addresses (D)</p> Signup and view all the answers

In the TCP/IP model, what protocol is responsible for finding the physical address of a router that corresponds to its logical address?

<p>Address Resolution Protocol (ARP) (C)</p> Signup and view all the answers

What is the relationship between Logical Addresses and Physical Addresses in TCP/IP?

<p>Logical Addresses are related to network layer, while Physical Addresses are related to data link layer (D)</p> Signup and view all the answers

What is the purpose of the Address Resolution Protocol (ARP) in TCP/IP?

<p>To resolve logical addresses to physical addresses (B)</p> Signup and view all the answers

How many pairs of addresses does each router have on average in a network with multiple connections?

<p>A pair for each connection (B)</p> Signup and view all the answers

What addresses are used in an internet employing the TCP/IP protocols?

<p>Logical, physical, port, and specific addresses (D)</p> Signup and view all the answers

What does the Stream Control Transmission Protocol (SCTP) provide that distinguishes it from other protocols?

<p>Reliable connection management (D)</p> Signup and view all the answers

What distinguishes Physical Addresses from Logical Addresses in a network employing TCP/IP protocols?

<p>Physical Addresses are associated with the data link layer while Logical Addresses are associated with the network layer. (C)</p> Signup and view all the answers

Which layer of the TCP/IP model is responsible for ensuring reliable data delivery?

<p>Transport Layer (B)</p> Signup and view all the answers

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Study Notes

Protocol Functions and OSI Model

  • The function of reducing duplication of effort is inherent in many protocols, providing similar capabilities across different protocol levels.
  • Hop-to-hop delivery occurs in the Data Link layer of the OSI model.

TCP/IP Protocol Suite

  • The TCP/IP protocol suite originally defined four layers.
  • The Transport layer in the TCP/IP protocol suite corresponds to the Transport layer of the OSI model.
  • The Network Access layer in TCP/IP is responsible for network access.

OSI Model Layers

  • The Presentation layer of the OSI model aims to translate, encrypt, and compress data for the application layer.

Addressing and Protocols in TCP/IP

  • Most local-area networks use MAC (Media Access Control) addressing for physical addresses.
  • In the TCP/IP model, the Address Resolution Protocol (ARP) locates the physical address corresponding to a given logical address (IP address).
  • Logical Addresses (IP addresses) are used for routing packets over networks, while Physical Addresses (MAC addresses) are used for local delivery within a network.

ARP and Routing

  • The Address Resolution Protocol (ARP) in TCP/IP serves to map the IP address of a system to its corresponding MAC address.
  • Each router in a network with multiple connections typically has two pairs of addresses: a logical address (IP) and a physical address (MAC).

Internet Addresses and Transport Protocols

  • Internet communications utilizing TCP/IP protocols employ IP addresses for logical addressing.
  • Stream Control Transmission Protocol (SCTP) distinguishes itself by supporting multi-streaming and multi-homing capabilities, offering reliable and ordered transmission of messages.

Reliable Data Delivery

  • The Transport layer in the TCP/IP model is responsible for ensuring reliable data delivery through acknowledgments and retransmissions.

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