1 chapter 1: why are network layers important? + course hero

What is IPv4 header?

How does IPv6 help routing?

What is the data portion of a packet in a network layer?

What is the IP header diagram?

How many octets are in IPv4 header?

How many IPv4 addresses are there?

What is the process of encapsulating data layer by layer?

See 4 more

About this website

Chapter 6: Network layer Flashcards | Quizlet

Study with Quizlet and memorize flashcards containing terms like What do we call communication between networks?, What is the purpose of the network layer - or OSI Layer 3?, What are the 4 basic processes used by the network layer to accomplish end-to-end transport? and more.

What are Four basic processes used in the network layer to ... - Answers

What are the four basic processes used in the network layer to accomplish end to end transport? 1. packet ia addresed to proper destination. 2.

What are the four basic processes used in the network layer to ...

1. packet ia addresed to proper destination. 2. packet is encapsulated with necessary data to deliver. 3. packet is routed through web of networks that can deliver it. 4. finally destination ...

What is IPv4 header?

An IPv4 packet header consists of fields containing important information about the packet. These fields contain binary numbers which are examined by the Layer 3 process. The binary values of each field identify various settings of the IP packet. Protocol header diagrams, which are read left to right, and top down, provide a visual to refer to when discussing protocol fields.

How does IPv6 help routing?

More Efficient Routing : IPv6 reduces the size of routing tables and makes routing more efficient and hierarchical. IPv6 allows ISPs to aggregate the prefixes of their customers' networks into a single prefix and announce this one prefix to the IPv6 Internet. In addition, in IPv6 networks, fragmentation is handled by the source device, rather than the router, using a protocol for discovery of the path's maximum transmission unit (MTU).

What is the data portion of a packet in a network layer?

In all cases, the data portion of the packet, that is, the encapsulated transport layer PDU, remains unchanged during the network layer processes.

What is the IP header diagram?

The IP protocol header diagram in the figure identifies the fields of an IPv4 packet.

How many octets are in IPv4 header?

For instance, the IPv4 header consists of 20 octets (up to 60 bytes if the Options field is used) and 12 basic header fields, not including the Options field and Padding field.

How many IPv4 addresses are there?

IP address depletion - IPv4 has a limited number of unique public IPv4 addresses available. Although there are approximately 4 billion IPv4 addresses, the increasing number of new IP-enabled devices, always-on connections, and the potential growth of less-developed regions have increased the need for more addresses.

What is the process of encapsulating data layer by layer?

The process of encapsulating data layer by layer enables the services at the different layers to develop and scale without affecting the other layers. This means the transport layer segments can be readily packaged by IPv4 or IPv6 or by any new protocol that might be developed in the future.

How many layers are there in the OSI model?

Internet hosts communicate by using a special software mechanism called layers (or layered protocols ). The OSI Model has seven layers, and TCP/IP has four.

What is the ITU and ISO?

ISO and ITU established a positive vendor relationship with Honeywell Information Systems, which worked with the international teams. In 1984, the ITU and ISO teams merged their respective standards work into a single document, and much of the final product came from Honeywell engineers. The standards document was released under the umbrella name Open Systems Interconnection, which is now referred to as the OSI Reference Model (or simply the OSI Model). The cooperating international organizations designate the specification as follows:

Why is TCP/IP the global standard?

The headstart that was gained by the development period and 1983 release date is said to be the reason that TCP/IP is now the global standard for Internet communications. Now that you have an abridged knowledge of the history of the Internet it’s time to explore the OSI Model and TCP/IP.

What is the purpose of the protocol stack?

The goal that was realized by the creation of this protocol mix , which is often called a “protocol stack,” is a means for open communication between disparate computers. The driving forces behind the Internet was the United States Department of Defense (DoD), specifically the Defense Advanced Research Projects Agency (DARPA), and two international organizations: the International Organization for Standardization (ISO) and the International Telecommunications Union (ITU).

What is RFC 793?

RFC 793, Transmission Control Protocol. These are the most current RFC numbers and descriptions; the authoritative organization of the day was the Internet Configuration Control Board (ICCB), who designated the original releases as RFC 760, DoD Standard Internet Protocol and RFC 761, DoD Standard Transmission Control Protocol.

When did Darpa start working on the ARPANET network?

DARPA began work on its network, ARPANET, in 1968, which went into full production in 1970. At the time, the protocol in use was the ARPANET Network Control Program (NCP) host-to-host protocol, and the first five nodes added belonged to Bolt, Beranek, and Newman (BBN); Stanford University; UCLA; UC Santa Barbara; and the University of Utah.

Why did traffic cops become easier to communicate with?

Disregarding that this analogy is fiction, the conversation became easier because traffic cops along the route did not spend time meeting all the same requirements. All they needed was physical connectivity, a common language for communication, and a list of recipient addresses that they could share.

What is IPv4 header?

An IPv4 packet header consists of fields containing important information about the packet. These fields contain binary numbers which are examined by the Layer 3 process. The binary values of each field identify various settings of the IP packet. Protocol header diagrams, which are read left to right, and top down, provide a visual to refer to when discussing protocol fields.

How does IPv6 help routing?

More Efficient Routing : IPv6 reduces the size of routing tables and makes routing more efficient and hierarchical. IPv6 allows ISPs to aggregate the prefixes of their customers' networks into a single prefix and announce this one prefix to the IPv6 Internet. In addition, in IPv6 networks, fragmentation is handled by the source device, rather than the router, using a protocol for discovery of the path's maximum transmission unit (MTU).

What is the data portion of a packet in a network layer?

In all cases, the data portion of the packet, that is, the encapsulated transport layer PDU, remains unchanged during the network layer processes.

What is the IP header diagram?

The IP protocol header diagram in the figure identifies the fields of an IPv4 packet.

How many octets are in IPv4 header?

For instance, the IPv4 header consists of 20 octets (up to 60 bytes if the Options field is used) and 12 basic header fields, not including the Options field and Padding field.

How many IPv4 addresses are there?

IP address depletion - IPv4 has a limited number of unique public IPv4 addresses available. Although there are approximately 4 billion IPv4 addresses, the increasing number of new IP-enabled devices, always-on connections, and the potential growth of less-developed regions have increased the need for more addresses.

What is the process of encapsulating data layer by layer?

The process of encapsulating data layer by layer enables the services at the different layers to develop and scale without affecting the other layers. This means the transport layer segments can be readily packaged by IPv4 or IPv6 or by any new protocol that might be developed in the future.