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How does SMTP mark the end of a message body?
The HTTP protocol simply declares the entire length of the message in part of the header called "Content-length header field".
Why does the TCP header have a header length field and UDP header does not?
in tcp header (32 bits) we have a field that is called options and padding that has variable in length and the header length shows the actual header size i.e size of 20 octets+size of options and padding field and in UDP we dont have any field like that and its header is fixed of 8 OCTETS (32 bits header size) refrence: WIRELESS COMMUNICATIONS AND NETWORKS by William Stallings Second Edition pg 91(see fig)
What does the protocol field in the IP header identify?
The protocol field, in the IP header, identifies what kind of data is in the IP packet - the upper-layer protocol. For example, if the code is 6, that means that the data is a TCP segment.
Which IPv4 header field is responsible for defining the priority of the packet?
differentiated services
Which field are contained within an IEEE Ethernet frame header?
1)Source and destination MAC Address 2)FCS Field
What field was added to the rip message by rfc 1723 to add support for vlsm and cidr?
Subnet mask
How does SMTP mark the end of a message body?
The HTTP protocol simply declares the entire length of the message in part of the header called "Content-length header field".
What is the Content-Type header field used for?
The content-type header field is used to explain what the body of the text is about. Specific media types and other details pertaining to the message can be specified in the field.
Why does the TCP header have a header length field and UDP header does not?
in tcp header (32 bits) we have a field that is called options and padding that has variable in length and the header length shows the actual header size i.e size of 20 octets+size of options and padding field and in UDP we dont have any field like that and its header is fixed of 8 OCTETS (32 bits header size) refrence: WIRELESS COMMUNICATIONS AND NETWORKS by William Stallings Second Edition pg 91(see fig)
The maximum size of an IP datagram including the header is?
The datagram length field in an IP header is 16 bits in length. Therefore, the maximum datagram size an IP datagram can support is 2^16 - 1 = 65,535 bytes
What is The header of an IPv4?
Header is always a multiple of 4bytes and so we can have a maximum length of the field as 15, so maximum size of the header is 60 bytes out of which 20 bytes are mandatory.
What can email do?
Electronic mail, often abbreviated as email or e-mail, is a method of exchanging digital messages, designed primarily for human use. An electronic mail message consists of two components, the message header, and the message body, which is the email's content. The message header contains control information, including, minimally, an originator's email address and one or more recipient addresses. Usually additional information is added, such as a subject header field. E-mail systems are based on a store-and-forward model in which e-mail computer server systems accept, forward, deliver and store messages on behalf of users, who only need to connect to the e-mail infrastructure, typically an e-mail server, with a network-enabled device (e.g., a personal computer) for the duration of message submission or retrieval. Rarely is e-mail transmitted directly from one user's device to another's.Wikipedia
What does the protocol field in the IP header identify?
The protocol field, in the IP header, identifies what kind of data is in the IP packet - the upper-layer protocol. For example, if the code is 6, that means that the data is a TCP segment.
What IPv6 header field is used to identify the upper layer protocol or optional extension headers that are appended to the end of an IPv6 packet?
next header
Which tcp segment header field controls the termination of a session?
code bits
Which IPv4 header field is responsible for defining the priority of the packet?
differentiated services
How are the Cc field and the Bcc field different?
Cc stands for carbon copy and it means that whoever name appears after the Cc: will get a copy of the message. People who receive the mail can see who else is getting the copy of the message. The Cc header would also appear inside the header of the received message.Bcc stands for blind carbon copy. With Bcc the recipients specified in this field do not appear in the received message. So all the recipients will get the message but cannot see others' name on the sent addresses.Cc stands for carbon copy which means that whose address appears after the Cc: header would receive a copy of the message. Also, the Cc header would also appear inside the header of the received message.Bcc stands for blind carbon copy which is similar to that of Cc except that the Email address of the recipients specified in this field do not appear in the received message header and the recipients in the To or Cc fields will not know that a copy sent to these address.cc stand for carbon copy.bcc stands for blind carbon copy, which means that the recipients can't see the names/addresses of who else got copies.'CC' means 'Carbon Copy,' and anyone who is added in this field will not only see the email but will see who else the email was sent to, as will everyone else. 'BCC,' or 'Blind Carbon Copy,' means that those who are copied in will not be able to see who else the email was sent to, and neither would the original receiver of the email.Originally, CC stood for carbon copy. Now, some refer to it as courtesy copy. BCC stands for Blind copy.cc means 'carbon copy' . It means all recipients know the person who is 'cc'ed' is receiving a copy of the email.Eg. When you send a message to your class mates belonging to a group mail id, a copy will be sent to the HOD. The group members will BE AWARE of this COPY being sent.bcc means 'blind carbon copy' and only the person to whom the email is 'bcc'ed' knows he or she is receiving it. The important difference her is the TO recepient will not know the Bcc RECEPIENTS.The term cc stands for carbon copy, and bcc for blind carbon copy. The cc addressee is visible in the email, but the bcc is not.
