The document discusses the history and layers of the TCP/IP protocol model. It was created by the Department of Defense to build a network that could survive any conditions. The four layers are application, transport, internet, and network access. The application layer supports protocols for file transfer, email, and other applications. The transport layer provides end-to-end control and segmentation of data. The internet layer routes packets through the network using IP. The network access layer defines LAN and WAN technologies.
Although the OSI reference model is universally recognized, the historical and technical open standard of the Internet is Transmission Control Protocol / Internet Protocol (TCP/IP).
The TCP/IP reference model and the TCP/IP protocol stack make data communication possible between any two computers, anywhere in the world, at nearly the speed of light.
Although the OSI reference model is universally recognized, the historical and technical open standard of the Internet is Transmission Control Protocol / Internet Protocol (TCP/IP).
The TCP/IP reference model and the TCP/IP protocol stack make data communication possible between any two computers, anywhere in the world, at nearly the speed of light.
TRANSPORT LAYER OF OSI MODEL
WHAT IS OSI MODEL?
LAYERS OF OSI MODEL
Data format of “OSI” Layers
Benefits of the OSI Model
WHAT IS TRANSPORT LAYER?
WORKING OF TRANSPORT LAYER
SERVICES BY TRANSPORT LAYER
Protocols of transport layer
USER DATAGRAM PROTOCOL (UDP)
TRANSMISSION CONTROL PROTOCOL(TCP)
Sliding window Control or 3-Way Handshake
Functions of TCP
The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers data between adjacent network nodes in a wide area network (WAN) or between nodes on the same local area network (LAN) segment.
TRANSPORT LAYER OF OSI MODEL
WHAT IS OSI MODEL?
LAYERS OF OSI MODEL
Data format of “OSI” Layers
Benefits of the OSI Model
WHAT IS TRANSPORT LAYER?
WORKING OF TRANSPORT LAYER
SERVICES BY TRANSPORT LAYER
Protocols of transport layer
USER DATAGRAM PROTOCOL (UDP)
TRANSMISSION CONTROL PROTOCOL(TCP)
Sliding window Control or 3-Way Handshake
Functions of TCP
The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers data between adjacent network nodes in a wide area network (WAN) or between nodes on the same local area network (LAN) segment.
In this presentation, we will discuss in details about the TCP/ IP framework, the backbone of every ebusiness.
To know more about Welingkar School’s Distance Learning Program and courses offered, visit:
http://www.welingkaronline.org/distance-learning/online-mba.html
Slides for a college course at City College San Francisco. Based on "Hands-On Ethical Hacking and Network Defense, Third Edition" by Michael T. Simpson, Kent Backman, and James Corley -- ISBN: 9781285454610.
Instructor: Sam Bowne
Class website: https://samsclass.info/123/123_S17.shtml
Protocols And IP suite PPT
Contents are
History
TCP/IP Suite Layer
a} Network Interface
b} Internet Layer
c} Transport Layer
d} Application Layer
3.Comparison of OSI and IP
From Slave to Scourge: The Existential Choice of Django Unchained. The Philos...Rodney Thomas Jr
#SSAPhilosophy #DjangoUnchained #DjangoFreeman #ExistentialPhilosophy #Freedom #Identity #Justice #Courage #Rebellion #Transformation
Welcome to SSA Philosophy, your ultimate destination for diving deep into the profound philosophies of iconic characters from video games, movies, and TV shows. In this episode, we explore the powerful journey and existential philosophy of Django Freeman from Quentin Tarantino’s masterful film, "Django Unchained," in our video titled, "From Slave to Scourge: The Existential Choice of Django Unchained. The Philosophy of Django Freeman!"
From Slave to Scourge: The Existential Choice of Django Unchained – The Philosophy of Django Freeman!
Join me as we delve into the existential philosophy of Django Freeman, uncovering the profound lessons and timeless wisdom his character offers. Through his story, we find inspiration in the power of choice, the quest for justice, and the courage to defy oppression. Django Freeman’s philosophy is a testament to the human spirit’s unyielding drive for freedom and justice.
Don’t forget to like, comment, and subscribe to SSA Philosophy for more in-depth explorations of the philosophies behind your favorite characters. Hit the notification bell to stay updated on our latest videos. Let’s discover the principles that shape these icons and the profound lessons they offer.
Django Freeman’s story is one of the most compelling narratives of transformation and empowerment in cinema. A former slave turned relentless bounty hunter, Django’s journey is not just a physical liberation but an existential quest for identity, justice, and retribution. This video delves into the core philosophical elements that define Django’s character and the profound choices he makes throughout his journey.
Link to video: https://youtu.be/GszqrXk38qk
Scandal! Teasers June 2024 on etv Forum.co.zaIsaac More
Monday, 3 June 2024
Episode 47
A friend is compelled to expose a manipulative scheme to prevent another from making a grave mistake. In a frantic bid to save Jojo, Phakamile agrees to a meeting that unbeknownst to her, will seal her fate.
Tuesday, 4 June 2024
Episode 48
A mother, with her son's best interests at heart, finds him unready to heed her advice. Motshabi finds herself in an unmanageable situation, sinking fast like in quicksand.
Wednesday, 5 June 2024
Episode 49
A woman fabricates a diabolical lie to cover up an indiscretion. Overwhelmed by guilt, she makes a spontaneous confession that could be devastating to another heart.
Thursday, 6 June 2024
Episode 50
Linda unwittingly discloses damning information. Nhlamulo and Vuvu try to guide their friend towards the right decision.
Friday, 7 June 2024
Episode 51
Jojo's life continues to spiral out of control. Dintle weaves a web of lies to conceal that she is not as successful as everyone believes.
Monday, 10 June 2024
Episode 52
A heated confrontation between lovers leads to a devastating admission of guilt. Dintle's desperation takes a new turn, leaving her with dwindling options.
Tuesday, 11 June 2024
Episode 53
Unable to resort to violence, Taps issues a verbal threat, leaving Mdala unsettled. A sister must explain her life choices to regain her brother's trust.
Wednesday, 12 June 2024
Episode 54
Winnie makes a very troubling discovery. Taps follows through on his threat, leaving a woman reeling. Layla, oblivious to the truth, offers an incentive.
Thursday, 13 June 2024
Episode 55
A nosy relative arrives just in time to thwart a man's fatal decision. Dintle manipulates Khanyi to tug at Mo's heartstrings and get what she wants.
Friday, 14 June 2024
Episode 56
Tlhogi is shocked by Mdala's reaction following the revelation of their indiscretion. Jojo is in disbelief when the punishment for his crime is revealed.
Monday, 17 June 2024
Episode 57
A woman reprimands another to stay in her lane, leading to a damning revelation. A man decides to leave his broken life behind.
Tuesday, 18 June 2024
Episode 58
Nhlamulo learns that due to his actions, his worst fears have come true. Caiphus' extravagant promises to suppliers get him into trouble with Ndu.
Wednesday, 19 June 2024
Episode 59
A woman manages to kill two birds with one stone. Business doom looms over Chillax. A sobering incident makes a woman realize how far she's fallen.
Thursday, 20 June 2024
Episode 60
Taps' offer to help Nhlamulo comes with hidden motives. Caiphus' new ideas for Chillax have MaHilda excited. A blast from the past recognizes Dintle, not for her newfound fame.
Friday, 21 June 2024
Episode 61
Taps is hungry for revenge and finds a rope to hang Mdala with. Chillax's new job opportunity elicits mixed reactions from the public. Roommates' initial meeting starts off on the wrong foot.
Monday, 24 June 2024
Episode 62
Taps seizes new information and recruits someone on the inside. Mary's new job
Meet Crazyjamjam - A TikTok Sensation | Blog EternalBlog Eternal
Crazyjamjam, the TikTok star everyone's talking about! Uncover her secrets to success, viral trends, and more in this exclusive feature on Blog Eternal.
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As a film director, I have always been awestruck by the magic of animation. Animation, a medium once considered solely for the amusement of children, has undergone a significant transformation over the years. Its evolution from a rudimentary form of entertainment to a sophisticated form of storytelling has stirred my creativity and expanded my vision, offering limitless possibilities in the realm of cinematic storytelling.
In the vast landscape of cinema, stories have been told, retold, and reimagined in countless ways. At the heart of this narrative evolution lies the concept of a "remake". A successful remake allows us to revisit cherished tales through a fresh lens, often reflecting a different era's perspective or harnessing the power of advanced technology. Yet, the question remains, what makes a remake successful? Today, we will delve deeper into this subject, identifying the key ingredients that contribute to the success of a remake.
From the Editor's Desk: 115th Father's day Celebration - When we see Father's day in Hindu context, Nanda Baba is the most vivid figure which comes to the mind. Nanda Baba who was the foster father of Lord Krishna is known to provide love, care and affection to Lord Krishna and Balarama along with his wife Yashoda; Letter’s to the Editor: Mother's Day - Mother is a precious life for their children. Mother is life breath for her children. Mother's lap is the world happiness whose debt can never be paid.
Are the X-Men Marvel or DC An In-Depth Exploration.pdfXtreame HDTV
The world of comic books is vast and filled with iconic characters, gripping storylines, and legendary rivalries. Among the most famous groups of superheroes are the X-Men. Created in the early 1960s, the X-Men have become a cultural phenomenon, featuring in comics, animated series, and blockbuster movies. A common question among newcomers to the comic book world is: Are the X-Men Marvel or DC? This article delves into the history, creators, and significant moments of the X-Men to provide a comprehensive answer.
Maximizing Your Streaming Experience with XCIPTV- Tips for 2024.pdfXtreame HDTV
In today’s digital age, streaming services have become an integral part of our entertainment lives. Among the myriad of options available, XCIPTV stands out as a premier choice for those seeking seamless, high-quality streaming. This comprehensive guide will delve into the features, benefits, and user experience of XCIPTV, illustrating why it is a top contender in the IPTV industry.
Panchayat Season 3 - Official Trailer.pdfSuleman Rana
The dearest series "Panchayat" is set to make a victorious return with its third season, and the fervor is discernible. The authority trailer, delivered on May 28, guarantees one more enamoring venture through the country heartland of India.
Jitendra Kumar keeps on sparkling as Abhishek Tripathi, the city-reared engineer who ends up functioning as the secretary of the Panchayat office in the curious town of Phulera. His nuanced depiction of a young fellow exploring the difficulties of country life while endeavoring to adjust to his new environmental factors has earned far and wide recognition.
Neena Gupta and Raghubir Yadav return as Manju Devi and Brij Bhushan Dubey, separately. Their dynamic science and immaculate acting rejuvenate the hardships of town administration. Gupta's depiction of the town Pradhan with an ever-evolving outlook, matched with Yadav's carefully prepared exhibition, adds profundity and credibility to the story.
New Difficulties and Experiences
The trailer indicates new difficulties anticipating the characters, as Abhishek keeps on wrestling with his part in the town and his yearnings for a superior future. The series has reliably offset humor with social editorial, and Season 3 looks ready to dig much more profound into the intricacies of rustic organization and self-awareness.
Watchers can hope to see a greater amount of the enchanting and particular residents who have become fan top picks. Their connections and the one of a kind cut of-life situations give a reviving and interesting portrayal of provincial India, featuring the two its appeal and its difficulties.
A Mix of Humor and Heart
One of the signs of "Panchayat" is its capacity to mix humor with sincere narrating. The trailer features minutes that guarantee to convey giggles, as well as scenes that pull at the heartstrings. This equilibrium has been a critical calculate the show's prosperity, resounding with crowds across different socioeconomics.
Creation Greatness
The creation quality remaining parts first rate, with the beautiful setting of Phulera town filling in as a scenery that upgrades the narrating. The meticulousness in portraying provincial life, joined with sharp composition and solid exhibitions, guarantees that "Panchayat" keeps on hanging out in the packed web series scene.
Expectation and Delivery
As the delivery date draws near, expectation for "Panchayat" Season 3 is at a record-breaking high. The authority trailer has previously created critical buzz, with fans enthusiastically anticipating the continuation of Abhishek Tripathi's excursion and the new undertakings that lie ahead in Phulera.
All in all, the authority trailer for "Panchayat" Season 3 recommends that watchers are in for another drawing in and engaging ride. Yet again with its charming characters, convincing story, and ideal mix of humor and show, the new season is set to enamor crowds. Write in your schedules and prepare to get back to the endearing universe of "Panchayat."
Skeem Saam in June 2024 available on ForumIsaac More
Monday, June 3, 2024 - Episode 241: Sergeant Rathebe nabs a top scammer in Turfloop. Meikie is furious at her uncle's reaction to the truth about Ntswaki.
Tuesday, June 4, 2024 - Episode 242: Babeile uncovers the truth behind Rathebe’s latest actions. Leeto's announcement shocks his employees, and Ntswaki’s ordeal haunts her family.
Wednesday, June 5, 2024 - Episode 243: Rathebe blocks Babeile from investigating further. Melita warns Eunice to stay clear of Mr. Kgomo.
Thursday, June 6, 2024 - Episode 244: Tbose surrenders to the police while an intruder meddles in his affairs. Rathebe's secret mission faces a setback.
Friday, June 7, 2024 - Episode 245: Rathebe’s antics reach Kganyago. Tbose dodges a bullet, but a nightmare looms. Mr. Kgomo accuses Melita of witchcraft.
Monday, June 10, 2024 - Episode 246: Ntswaki struggles on her first day back at school. Babeile is stunned by Rathebe’s romance with Bullet Mabuza.
Tuesday, June 11, 2024 - Episode 247: An unexpected turn halts Rathebe’s investigation. The press discovers Mr. Kgomo’s affair with a young employee.
Wednesday, June 12, 2024 - Episode 248: Rathebe chases a criminal, resorting to gunfire. Turf High is rife with tension and transfer threats.
Thursday, June 13, 2024 - Episode 249: Rathebe traps Kganyago. John warns Toby to stop harassing Ntswaki.
Friday, June 14, 2024 - Episode 250: Babeile is cleared to investigate Rathebe. Melita gains Mr. Kgomo’s trust, and Jacobeth devises a financial solution.
Monday, June 17, 2024 - Episode 251: Rathebe feels the pressure as Babeile closes in. Mr. Kgomo and Eunice clash. Jacobeth risks her safety in pursuit of Kganyago.
Tuesday, June 18, 2024 - Episode 252: Bullet Mabuza retaliates against Jacobeth. Pitsi inadvertently reveals his parents’ plans. Nkosi is shocked by Khwezi’s decision on LJ’s future.
Wednesday, June 19, 2024 - Episode 253: Jacobeth is ensnared in deceit. Evelyn is stressed over Toby’s case, and Letetswe reveals shocking academic results.
Thursday, June 20, 2024 - Episode 254: Elizabeth learns Jacobeth is in Mpumalanga. Kganyago's past is exposed, and Lehasa discovers his son is in KZN.
Friday, June 21, 2024 - Episode 255: Elizabeth confirms Jacobeth’s dubious activities in Mpumalanga. Rathebe lies about her relationship with Bullet, and Jacobeth faces theft accusations.
Monday, June 24, 2024 - Episode 256: Rathebe spies on Kganyago. Lehasa plans to retrieve his son from KZN, fearing what awaits.
Tuesday, June 25, 2024 - Episode 257: MaNtuli fears for Kwaito’s safety in Mpumalanga. Mr. Kgomo and Melita reconcile.
Wednesday, June 26, 2024 - Episode 258: Kganyago makes a bold escape. Elizabeth receives a shocking message from Kwaito. Mrs. Khoza defends her husband against scam accusations.
Thursday, June 27, 2024 - Episode 259: Babeile's skillful arrest changes the game. Tbose and Kwaito face a hostage crisis.
Friday, June 28, 2024 - Episode 260: Two women face the reality of being scammed. Turf is rocked by breaking
Tom Selleck Net Worth: A Comprehensive Analysisgreendigital
Over several decades, Tom Selleck, a name synonymous with charisma. From his iconic role as Thomas Magnum in the television series "Magnum, P.I." to his enduring presence in "Blue Bloods," Selleck has captivated audiences with his versatility and charm. As a result, "Tom Selleck net worth" has become a topic of great interest among fans. and financial enthusiasts alike. This article delves deep into Tom Selleck's wealth, exploring his career, assets, endorsements. and business ventures that contribute to his impressive economic standing.
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Early Life and Career Beginnings
The Foundation of Tom Selleck's Wealth
Born on January 29, 1945, in Detroit, Michigan, Tom Selleck grew up in Sherman Oaks, California. His journey towards building a large net worth began with humble origins. , Selleck pursued a business administration degree at the University of Southern California (USC) on a basketball scholarship. But, his interest shifted towards acting. leading him to study at the Hills Playhouse under Milton Katselas.
Minor roles in television and films marked Selleck's early career. He appeared in commercials and took on small parts in T.V. series such as "The Dating Game" and "Lancer." These initial steps, although modest. laid the groundwork for his future success and the growth of Tom Selleck net worth. Breakthrough with "Magnum, P.I."
The Role that Defined Tom Selleck's Career
Tom Selleck's breakthrough came with the role of Thomas Magnum in the CBS television series "Magnum, P.I." (1980-1988). This role made him a household name and boosted his net worth. The series' popularity resulted in Selleck earning large salaries. leading to financial stability and increased recognition in Hollywood.
"Magnum P.I." garnered high ratings and critical acclaim during its run. Selleck's portrayal of the charming and resourceful private investigator resonated with audiences. making him one of the most beloved television actors of the 1980s. The success of "Magnum P.I." played a pivotal role in shaping Tom Selleck net worth, establishing him as a major star.
Film Career and Diversification
Expanding Tom Selleck's Financial Portfolio
While "Magnum, P.I." was a cornerstone of Selleck's career, he did not limit himself to television. He ventured into films, further enhancing Tom Selleck net worth. His filmography includes notable movies such as "Three Men and a Baby" (1987). which became the highest-grossing film of the year, and its sequel, "Three Men and a Little Lady" (1990). These box office successes contributed to his wealth.
Selleck's versatility allowed him to transition between genres. from comedies like "Mr. Baseball" (1992) to westerns such as "Quigley Down Under" (1990). This diversification showcased his acting range. and provided many income streams, reinforcing Tom Selleck net worth.
Television Resurgence with "Blue Bloods"
Sustaining Wealth through Consistent Success
In 2010, Tom Selleck began starring as Frank Reagan i
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2. 2
Version 3.0
History of TCP/IP
• The U.S. Department of Defense (DoD) created the TCP/IP
reference model because it wanted a network that could survive
any conditions.
• The TCP/IP model has since become the standard on which
the Internet is based.
• In 1992 the standardization of a new generation of IP, often
called IPng, was supported by the Internet Engineering Task
Force (IETF). IPng is now known as IPv6.
3. 3
Version 3.0
The TCP/IP model has four layers: The Application layer,
Transport layer, Internet layer, and Network Access layer.
TCP/IP Model
4. 4
Version 3.0
Application Layer
• The application layer of the TCP/IP model handles
high-level protocols, issues of representation,
encoding, and dialog control.
• The Application layer of the TCP/IP model has
protocols to support file transfer, e-mail, and remote
login, and many other applications.
6. 6
Version 3.0
Application Layer
• File Transfer Protocol (FTP)
• Trivial File Transfer Protocol (TFTP) – TFTP is a connectionless service
that uses the User Datagram Protocol (UDP).
• Network File System (NFS) – NFS is a distributed file system protocol
suite developed by Sun Microsystems that allows file access to a remote
storage device such as a hard disk across a network.
• Simple Mail Transfer Protocol (SMTP) – SMTP administers the
transmission of e-mail over computer networks.
• Terminal emulation (Telnet) – Telnet provides the capability to remotely
access another computer.
• Simple Network Management Protocol (SNMP) – SNMP is a protocol
that provides a way to monitor and control network devices, and to
manage configurations, statistics collection, performance, and security.
• Domain Name System (DNS) – DNS is a system used on the Internet for
translating names of domains and their publicly advertised network nodes
into IP addresses.
7. 7
Version 3.0
Transport Layer
• The transport layer provides transport services from the source
host to the destination host.
• The transport layer constitutes a logical connection between the
endpoints of the network, the sending host and the receiving
host.
• End-to-end control is the primary duty of the transport layer
when using TCP.
9. 9
Version 3.0
Transport Layer
Transport services include all the following services:
• TCP and UDP
– Segmenting upper-layer application data
– Sending segments from one end device to another end
device
• TCP only
– Establishing end-to-end operations
– Flow control provided by sliding windows
– Reliability provided by sequence numbers and
acknowledgments
10. 10
Version 3.0
Internet Layer
• The purpose of the Internet layer is to select the best path
through the network for packets to travel.
• The main protocol that functions at this layer is the
Internet Protocol (IP).
11. 11
Version 3.0
Internet Layer
The following protocols operate at the TCP/IP Internet layer:
• IP provides connectionless, best-effort delivery routing of
packets. IP is not concerned with the content of the
packets but looks for a path to the destination.
• Internet Control Message Protocol (ICMP) provides
control and messaging capabilities.
• Address Resolution Protocol (ARP) determines the data
link layer address, MAC address, for known IP addresses.
• Reverse Address Resolution Protocol (RARP) determines
IP addresses when the MAC address is known.
12. 12
Version 3.0
Network Access Layer
• The network access layer is also called the host-to-
network layer.
• It includes the LAN and WAN technology details
13. 13
Version 3.0
Comparing OSI and TCP/IP
Both have application layers,
though they include very different
services
TCP/IP combines the presentation
and session layer into its
application layer Combines the
Data Link and Physical layer into
the Network Access Layer
Both have comparable transport
and network layers
TCP/IP appears simpler because it
has fewer layers
Packet-switched, not circuit-
switched, technology is assumed
TCP/IP transport layer using UDP
does not always guarantee reliable
delivery of packets as the transport
layer in the OSI model does
14. 14
Version 3.0
Comparing OSI and TCP/IP
The OSI model is used as a guide for
understanding the communication process.
15. 15
Version 3.0
Addressing
• Each computer in a TCP/IP network must be given a
unique identifier, or IP address.
– This address, operates at Layer 3
• All computers also have a unique physical address, known
as a MAC address. These are assigned by the
manufacturer of the network interface card.
– MAC addresses operate at Layer 2 of the OSI model.
16. 16
Version 3.0
IPv4 Addresses
• An IP address is a 32-bit sequence of 1s and 0s
• Every IP address has two parts
– The network portion
– The host portion
• An IP address is an hierarchical address
• IP addresses are divided into classes to define the large,
medium, and small networks
– Class A
– Class B
– Class C
19. 19
Version 3.0
Reserved IP Addresses
• Certain host addresses
are reserved and cannot
be assigned to devices on
a network
– Network address – Used
to identify the network itself
– Broadcast address – Used
for broadcasting packets to
all the devices on a network
20. 20
Version 3.0
Private Addresses
• With the rapid growth of the Internet, public IP addresses
were beginning to run out.
• Solutions to expand the number of IP addresses available
for public use include:
– classless interdomain routing (CIDR)
– IPv6
– Private IP addresses
21. 21
Version 3.0
Private Addresses
• Internet requires translation of the private addresses to
public addresses.
• This translation process is referred to as Network Address
Translation (NAT)
22. 22
Version 3.0
Subnetting
• To create a subnet address, a network administrator
borrows bits from the host field and designates them as
the subnet field
• The minimum number of bits that can be borrowed is two
• The maximum number of bits that can be borrowed can be
any number that leaves at least two bits remaining, for the
host number
23. 23
Version 3.0
IPv4 and IPv6
• IPv6 uses 128 bits rather
than the 32 bits
• Provides 640 sextrillion
addresses
• IPv6 addresses are 128
bits long, written in
hexadecimal form, and
separated by colons. IPv6
fields are 16 bits long.
24. 24
Version 3.0
Assigning IP Addresses
• Network administrators use two methods to
assign IP addresses.
– Static
• Administratively assigned
– Dynamic
• Automatically assigned
25. 25
Version 3.0
Static IP Addresses
• Static assignment works best on small, infrequently
changing networks
• Good recordkeeping is critical to prevent problems which
occur with duplicate IP addresses
• Servers should be assigned a static IP address so
workstations and other devices will always know how to
access needed services
• Other devices that should be assigned static IP addresses
are network printers, application servers, and routers
26. 26
Version 3.0
RARP
• Reverse Address Resolution Protocol (RARP) associates
a known MAC addresses with an IP addresses
• A network device, such as a diskless workstation, might
know its MAC address but not its IP address. RARP
allows the device to make a request to learn its IP address
• Devices using RARP require that a RARP server be
present on the network to answer RARP requests
27. 27
Version 3.0
BOOTP
• The bootstrap protocol (BOOTP) operates in a client-server
environment
• BOOTP packets can include the IP address, as well as the
address of a router, the address of a server, and vendor-
specific information
• One problem with BOOTP is that it was not designed to provide
dynamic address assignment.
• With BOOTP, a network administrator manually creates a
configuration file for every host on the network that contains a
BOOTP profile along with an IP address assignment in it
28. 28
Version 3.0
DHCP
• Dynamic host configuration protocol (DHCP) is the successor to
BOOTP
• Unlike BOOTP, DHCP allows a host to obtain an IP address
dynamically without the network administrator having to set up
an individual profile for each device
• A range of IP addresses must be set-up on a DHCP server
• As hosts come online, they contact the DHCP server and
request an address. The DHCP server chooses an address and
leases it to that host
• The major advantage that DHCP has over BOOTP is that it
allows users to be mobile
29. 29
Version 3.0
ARP
• Address Resolution Protocol (ARP)
– Automatically maps IP to unknown MAC address
• For TCP/IP communications, a datagram on a local-area
network must contain both a destination MAC address and
a destination IP address. These addresses must be
correct and match the destination MAC and IP addresses
of the host device
• For communications between two LAN segments TCP/IP
has a variation on ARP called Proxy ARP that will provide
the MAC address of an intermediate device for
transmission outside the LAN to another network segment
30. 30
Version 3.0
ARP
•Some devices will keep tables
that contain MAC addresses and
IP addresses of other devices that
are connected to the same LAN.
•These are called Address
Resolution Protocol (ARP) tables.
•ARP tables are stored in RAM
memory, where the cached
information is maintained
automatically on each of the
devices