Which works in Layer 3 of OSI?

Network Layer of the OSI Model Operating at layer 3, a router will inspect the IP and IPX addresses of incoming data packets. A layer 3 device can decide how to forward a packet across the network.

How an email is sent using the OSI model?

The message is sent to the transport layer where data is segmented, and then the network layer breaks the segments into packets. Then, the packets are sent from the network layer to the data link layer, where packets are further broken down into frames.

What is SMTP protocol in networking?

Simple Mail Transfer Protocol (SMTP) is the standard protocol for email services on a TCP/IP network. SMTP provides the ability to send and receive email messages. SMTP is an application-layer protocol that enables the transmission and delivery of email over the Internet.

What layer of the OSI model is DHCP?

DHCP runs at the application layer of the Transmission Control Protocol/IP (TCP/IP) stack to dynamically assign IP addresses to DHCP clients and to allocate TCP/IP configuration information to DHCP clients. This includes subnet mask information, default gateway IP addresses and domain name system (DNS) addresses.

Which layer is responsible for the encoding of signals?

The data link layer is also called as the Layer 2 of the OSI model. Here are the basic functionalities of the data link layer: Responsible for encoding and decoding of the electrical signals into bits.

Is SMTP a pull protocol?

Most internet systems use SMTP as a method to transfer mail from one user to another. SMTP is a push protocol and is used to send the mail whereas POP (post office protocol) or IMAP (internet message access protocol) are used to retrieve those emails at the receiver’s side.

What is the SMTP port?

Ports. Communication between mail servers generally uses the standard TCP port 25 designated for SMTP.