IDF and MDF definitions - Cisco Learning Network
Intermediate Distribution Frame - smaller version of Comm room further down from MDF to interconnect devices that cannot reach MDF - over 100 meters. IDF usually connects to MDF via fiber optic cables …
Fundamentals of VLAN's - Router on a stick
We will connect one of routers FastEthernet interfaces, FastEthernet 0/0, to the switch's trunk port GigabitEthernet 0/5 Further, we will sub-divide this single FastEthernet 0/0 interface, virtually, in to …
Software Defined Segmentation - A Primer - Cisco Learning Network
Security Group Tag Distribution Cisco TrustSec uses two methods to distribute a Security Group Tag (SGT) throughout the network: Inline Tagging and SGT Exchange Protocol (SXP). Inline tagging …
Preventing Layer 2 Attacks - Cisco Learning Network
Before learning about configuring switches for security improvements, let us take a look at some of the types of attacks to which these layer 2 switches are vulnerable as that would lay the foundation for …
Ethernet Standards - Cisco Learning Network
Ethernet II came first and this frame format was introduced by the three vendors, Digital Equipment Corp., Intel, and Xerox (hence the name "DIX") as a result of a joint research carried out in the …
200-125 CCNA Exam Topics - Cisco Learning Network
Exam Description The Cisco Certified Network Associate (CCNA) Routing and Switching composite exam (200-125) is a 90-minute, 60–70 question assessment that is associated with the CCNA …
Introduction to VXLAN and EVPN - Cisco Learning Network
The outer IP header has a source and destination IP of the source and destination VTEP. The outer Ethernet header is used to forward the frame hop by hop over the Ethernet links. It’s very important …
Switch Packet Forwarding Decision - Cisco Learning Network
Hi, How does a switch ( L3 or L2 switch) decide whether it has to look its routing table or mac table in forwarding the packet ? Thanks, Yugandhar.
Fundamentals of Frame Relay - Part 1: How it works
The Frame-Relay-Switch receives the frame on its connected interface - Serial 1/1 & applies the configured frame relay logic: If the incoming DLCI information, ! attached to the data frame entering …
A Guide to Simple Two-Tier, Three-Tier, and Spine-Leaf Designs
Mar 20, 2025 · In this discussion, let's break down three major network architectures—Two-Tier, Three-Tier, and Spine-Leaf—using simple language and real-world examples to help you pick the best fit …