VLANs logically segment networks based on organizational functions rather than physical connections. This allows workstations and servers used by the same workgroup to communicate regardless of location. VLANs restrict communication between different VLAN groups and function by logically segmenting the network into broadcast domains so packets are only switched between ports in the same VLAN. Routers provide security, broadcast filtering, and traffic management between VLANs. VLANs address issues like scalability, security, and network management.
A virtual local area network (VLAN) is a group of hosts with a common set of requirements that communicate as if they were attached to the same broadcast domain regardless of their physical location
In computer networking, a single layer-2 network may be partitioned to create multiple distinct
broadcast domains, which are mutually isolated so that packets can only pass between them via one or
more routers; such a domain is referred to as a virtual local area network, virtual LAN or VLAN.
A virtual local area network (VLAN) is a logical group of workstations, servers and network devices that
appear to be on the same LAN despite their geographical distribution. A VLAN allows a network of
computers and users to communicate in a simulated environment as if they exist in a single LAN and are
sharing a single broadcast and multicast domain.
1. An introduction of LAN.
2. An introduction of VLAN.
3. Properties of VLAN.
4. Types of VLAN.
5. VLAN Identification Method
6. VLAN Trunking Protocol.
7. Inter-VLAN routing.
A virtual local area network (VLAN) is a group of hosts with a common set of requirements that communicate as if they were attached to the same broadcast domain regardless of their physical location
In computer networking, a single layer-2 network may be partitioned to create multiple distinct
broadcast domains, which are mutually isolated so that packets can only pass between them via one or
more routers; such a domain is referred to as a virtual local area network, virtual LAN or VLAN.
A virtual local area network (VLAN) is a logical group of workstations, servers and network devices that
appear to be on the same LAN despite their geographical distribution. A VLAN allows a network of
computers and users to communicate in a simulated environment as if they exist in a single LAN and are
sharing a single broadcast and multicast domain.
1. An introduction of LAN.
2. An introduction of VLAN.
3. Properties of VLAN.
4. Types of VLAN.
5. VLAN Identification Method
6. VLAN Trunking Protocol.
7. Inter-VLAN routing.
LAN
A Local Area Network (LAN) was originally defined as a network of computers located within the same area
Local Area Networks are defined as a single broadcast domain. This means that if a user broadcasts information on his/her LAN, the broadcast will be received by every other user on the LAN.
Broadcasts are prevented from leaving a LAN by using a router. The disadvantage of this method is routers usually take more time to process incoming data compared to a bridge or a switch
I tried to make as detailed, clear, abundant example and visual presentation of VLANs as possible. You can contact the e-mail address in the slide to get information about the yours issue or correct my any mistakes.
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June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
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The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
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Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
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Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
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2. VLAN introduction
VLANs logically segment switched networks based
on the functions, project teams, or applications of the
organization regardless of the physical location or
connections to the network.
All workstations and servers used by a particular
workgroup share the same VLAN, regardless of the
physical connection or location.
4. VLAN introduction
VLANs function by logically segmenting the network
into different broadcast domains so that packets are
only switched between ports that are designated for
the same VLAN.
Routers in VLAN
topologies provide
broadcast filtering,
security, and
traffic flow
management.
5. VLAN introduction
VLANs address scalability, security, and network
management.
Switches may not bridge any traffic between VLANs,
as this would violate the integrity of the VLAN
broadcast domain.
Traffic should only be routed between VLANs.
6. Broadcast domains with VLANs and routers
A VLAN is a broadcast domain created by one or
more switches.
7. Broadcast domains with VLANs and routers
Layer 3 routing allows the router to send packets to
the three different broadcast domains.
8. Broadcast domains with VLANs and routers
Implementing VLANs on a switch causes the
following to occur:
The switch maintains a separate bridging table for each
VLAN.
If the frame comes in on a port in VLAN 1, the switch
searches the bridging table for VLAN 1.
When the frame is received, the switch adds the source
address to the bridging table if it is currently unknown.
The destination is checked so a forwarding decision can be
made.
For learning and forwarding the search is made against the
address table for that VLAN only.
9. VLAN operation
Each switch port could be assigned to a different VLAN.
Ports assigned to the same VLAN share broadcasts.
Ports that do not belong to that VLAN do not share these
broadcasts.
10. VLAN operation
Users attached to the same shared segment, share
the bandwidth of that segment.
Each additional user attached to the shared medium
means less bandwidth and deterioration of network
performance.
VLANs offer more bandwidth to users than a shared
network.
The default VLAN for every port in the switch is the
management VLAN.
The management VLAN is always VLAN 1 and may
not be deleted. All other ports on the switch may be
reassigned to alternate VLANs.
11. VLAN operation
Dynamic VLANs allow for membership based on the
MAC address of the device connected to the switch port.
As a device enters the network, it queries a database
within the switch for a VLAN membership.
12. VLAN operation
In port-based or port-centric VLAN membership, the port
is assigned to a specific VLAN membership independent
of the user or system attached to the port.
All users of the
same port must
be in the same
VLAN.
14. Benefits of VLANs
The key benefit of VLANs is that they permit the network
administrator to organize the LAN logically instead of
physically.
15. VLAN types
There are three basic VLAN memberships for
determining and controlling how a packet gets
assigned: -
Port-based VLANs
MAC address based
Protocol based VLANs
The frame headers are encapsulated or modified to
reflect a VLAN ID before the frame is sent over the
link between switches.
Before forwarding to the destination device, the frame
header is changed back to the original format.
19. VLAN types
The number of VLANs in a switch vary depending on
several factors:
Traffic patterns
Types of applications
Network management needs
Group commonality
20. VLAN types
An important consideration in defining the size of the
switch and the number of VLANs is the IP addressing
scheme.
Because a one-to-one correspondence between
VLANs and IP subnets is strongly recommended,
there can be no more than 254 devices in any one
VLAN.
It is further recommended that VLANs should not
extend outside of the Layer 2 domain of the
distribution switch.
21. VLAN types
There are two major methods of frame tagging, Inter-
Switch Link (ISL) and 802.1Q.
ISL used to be the most common, but is now being
replaced by 802.1Q frame tagging.