Summary
samenvatting lessen 6-8 computer networks
- Course
- Institution
this is a summary of lessons from 6-8, please note that this does not include the labs
[Show more]
Seller
Follow
nickhemerycke
Content preview
Module 3: VLANs1. Overview of VLANs:
○ Definition and Benefits of VLANs:
■ VLANs (Virtual Local Area Networks) are used to segment
networks into smaller, isolated networks to reduce
broadcast traffic, improve security, and enhance network
performance.
■ Benefits:
■ Smaller broadcast domains, improved security,
enhanced IT efficiency, reduced cost, better
■ performance, and simpler management.
○ Types of VLANs:
■ Default VLAN: VLAN 1, the default VLAN for all ports.
■ Native VLAN: A VLAN not tagged on a trunk link, typically
used for backward compatibility.
■ Management VLAN: A VLAN used to manage the network
devices.
2. VLANs in a Multi-Switched Environment:
○ VLAN Trunks:
■ A trunk is a point-to-point link between network devices
carrying multiple VLANs. Cisco trunking supports the
802.1Q protocol, which allows VLANs to span across the
entire network.
○ Networks without VLANs:
■ Without VLANs, all devices connected to the switches
receive all types of network traffic, including unicast,
multicast, and broadcast traffic.
○ Networks with VLANs:
, ■ With VLANs, traffic is limited to devices within the same
VLAN. Communication between different VLANs requires a
Layer 3 device (like a router).
○ VLAN Identification with a Tag:
■ The IEEE 802.1Q header, which is 4 bytes, is used for
VLAN tagging. It includes fields like Type (Tag Protocol ID),
User Priority, Canonical Format Identifier (CFI), and VLAN
ID (VID).
3. VLAN Configuration:
○ VLAN Creation Commands:
■ Commands to create a VLAN in Cisco IOS, including
defining a VLAN ID and assigning a name.
○ VLAN Port Assignment Commands:
■ Steps to assign VLANs to specific switch ports, including
setting ports to access mode.
○ Verifying VLAN Configuration:
show vlanto display and verify VLAN
■ Commands like
information.
○ Changing VLAN Port Membership:
■ Instructions on how to change VLAN membership by
modifying port settings.
○ Deleting VLANs:
■ Procedures to delete individual or all VLANs and reset
switches to default settings.
4. VLAN Trunks:
○ Trunk Configuration Commands:
■ Instructions for setting up trunk links, including setting
trunk mode and specifying VLANs allowed on the trunk.
○ Verifying Trunk Configuration:
, show
■ Steps to confirm trunk settings using commands like
interfaces trunk
.
○ Resetting Trunk to Default:
■ Steps to reset trunk settings to default, such as restoring
VLAN 1 as the native VLAN.
Module 4: Inter-VLAN Routing
1. Inter-VLAN Routing Operation:
○ What is Inter-VLAN Routing?:
■ Process of forwarding traffic between VLANs using routers
or Layer 3 switches. Inter-VLAN routing allows
communication between hosts on different VLANs.
■ Inter-VLAN Routing Options:
■ Legacy Inter-VLAN Routing: Uses a router with
multiple Ethernet interfaces; not scalable.
■ Router-on-a-Stick: Uses a single router interface
configured as a trunk with multiple subinterfaces;
suitable for small to medium-sized networks.
■ Layer 3 Switch with SVIs (Switched Virtual
Interfaces): Provides the most scalable solution for
medium to large networks.
2. Legacy Inter-VLAN Routing:
○ Description:
■ Uses separate physical interfaces on a router for each
VLAN. This method is no longer commonly used due to
scalability issues.
3. Router-on-a-Stick Inter-VLAN Routing:
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller nickhemerycke. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.60. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78998 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now