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We are pleased to share with you all an interesting article contributed by Zied TURKI. Zied TURKI onsultant at NetXP All Articles by Zied TURKI How to contribute your article to Netmanias.com !...
01/18/2017
2,478
We are pleased to share with you all an interesting article contributed by Mina G. Nasry who has decent experience in Data Carrier/ISP scope. Mina G. Nasry Network Engineer, Core Team at NOOR Data Network All Articles by Mina G. Nasry...
10/24/2016
2,982
GSLB service enables users (clients) to connect to the most optimized server among those that serve the same purpose, improving service reliability. In addition, it helps to prevent traffic from being concentrated on a small number of servers, enhancing server availability. This post will discuss the benefits that GSLB can bring to an enterprise with distributed servers, and its service logic...
08/12/2015
7,931
Quick Guide to OSPF 1. Building Shortest Path Tree Topology ► 2. Redistributing External Network Routes into OSPF Network In the previous post, we explained the procedure of how routers create their network topology maps using Router-LSA messages in an OSPF network, and build the shortest path trees based on link costs. Below, we will see how OSPF routers learn the routing informat...
07/01/2015
6,582
Quick Guide to OSPF ► 1. Building Shortest Path Tree Topology 2. Redistributing External Network Routes into OSPF Network This time, we will discuss how routers discover IP network topologies and build shortest path trees by using OSPF protocols. Certainly, routing protocols like OSPF are based on operating principles that are hard to understand if you are not a routing expert. Man...
05/06/2015
8,715
We will talk about call flow in IEEE 802.1X-based user authentication used in Korean network operators' Wi-Fi networks. Before we continue, let's take a look at what Korean operators' current Wi-Fi authentication are like first. KT provides the following SSIDs in its Wi-Fi Hotspots: ollehWiFi (with lock icon): Users are authenticated based on the IMSI stored in USIM of their...
02/26/2015
20,906
Switching and Routing 1. Switching and Routing for Dummies - Ethernet Switching 2. Switching and Routing for Dummies - IP Routing 3. Switching and Routing - Part 1. Router Architecture 4. Switching and Routing - Part 2. Packet Forwarding by IP Router 5. Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch 6. Switching...
08/01/2014
17,518
Switching and Routing 1. Switching and Routing for Dummies - Ethernet Switching 2. Switching and Routing for Dummies - IP Routing 3. Switching and Routing - Part 1. Router Architecture 4. Switching and Routing - Part 2. Packet Forwarding by IP Router 5. Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch 6. Switching...
07/11/2014
19,628
Switching and Routing 1. Switching and Routing for Dummies - Ethernet Switching 2. Switching and Routing for Dummies - IP Routing 3. Switching and Routing - Part 1. Router Architecture 4. Switching and Routing - Part 2. Packet Forwarding by IP Router 5. Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch 6. Switching...
06/18/2014
16,868
Switching and Routing 1. Switching and Routing for Dummies - Ethernet Switching 2. Switching and Routing for Dummies - IP Routing 3. Switching and Routing - Part 1. Router Architecture 4. Switching and Routing - Part 2. Packet Forwarding by IP Router 5. Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch 6. Switching...
05/23/2014
17,607
Switching and Routing 1. Switching and Routing for Dummies - Ethernet Switching 2. Switching and Routing for Dummies - IP Routing 3. Switching and Routing - Part 1. Router Architecture 4. Switching and Routing - Part 2. Packet Forwarding by IP Router 5. Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch 6. Switching...
05/08/2014
16,388
Switching and Routing 1. Switching and Routing for Dummies - Ethernet Switching 2. Switching and Routing for Dummies - IP Routing 3. Switching and Routing - Part 1. Router Architecture 4. Switching and Routing - Part 2. Packet Forwarding by IP Router 5. Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch 6. Switching...
04/28/2014
17,520
Our previous document described the NAT behavior discovery algorithms defined in RFC 3489. This document will explain what algorithms for discovering NAT behaviors are defined in RFC 5780. Again, to fully understand what's discussed below, we recommend you read the following posts first: 1. NAT Behavioral Requirements, as Defined by the IETF (RFC 4787) - Part 1. Mapping Behavior 2....
11/18/2013
13,606
Table of Contents I. Overview II. Introduction to DHCP Proxy Agents III. Basic Operations of DHCP Proxy Agents IV. Security Functios of DHCP Proxy Agents V. Summary and Closing Appendix A - Format of DHCP Messages in IP Address Allocation/Lease Procedure Appendix B - Format of DHCP Messages in IP Address Renewal Procedure Appendix C - Format of DHC...
11/07/2013
13,765
Table of Contents I. Overview II. Why are DHCP Relay Agents Needed in DHCP Operations ? III. Basic Operation of DHCP Relay Agents Appendix - Format of DHCP Messages in a Network with DHCP Relay Agents I. Overview This document provides a technical understanding of a DHCP relay agent that is required in a multi-subnet environment where a DHCP client...
11/05/2013
19,671
Let us introduce the NAT behavior discovery algorithms defined in RFC 3489. To fully understand what's discussed below, we recommend you read the following posts first: 1. NAT Behavioral Requirements, as Defined by the IETF (RFC 4787) - Part 1. Mapping Behavior 2. NAT Behavioral Requirements, as Defined by the IETF (RFC 4787) - Part 2. Filtering Behavior 3. STUN (RFC 3489) vs. STUN (R...
11/04/2013
13,678
We will look into DHCP Option 82 used in the wireline networks of network operators today. Most of you are probably subscribing to a wireline Internet service provided by one of the network operators such as KT, SK Telecom or LGU+ (Korean Operators). When users subscribe to the Internet service, they pay a monthly fee to their network operator for using the Internet service. So, as a genera...
11/01/2013
12,743
Table of Contents I. Introduction II. Procedures for Detecting IP Address Conflicts III. DHCP Offer/ACK Messages: Broadcast or Unicast ? IV. State Transition of DHCP Clients I. Overview Dynamic Host Configuration Protocol (DHCP) has been widely adopted as a protocol for allocating network configuration data, including an IP address, dynamically to...
10/30/2013
14,334
Table of Contents I. Introduction II. IP Address Allocation/Lease Procedure III. IP Address Renewal Procedure IV. IP Address Release Procedure V. Summary VI. Closing Appendix A - Format of DHCP Messages in IP Address Allocation/Lease Procedure Appendix B - Format of DHCP Messages in IP Address Renewal Procedure Appendix C - Format of DHCP Me...
10/23/2013
18,953
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