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Technical Documents

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172

Shift of Enterprise Business from MPLS to SD-WAN

We are pleased to share with you all an interesting article contributed by Harpreet Kaur who is currently working as System Design Engineer in the Network Infra Team at Hughes Systique. She has 18 years of experience in telecom industry. She has been leading the SDN/NFV initiatives in the organization. Harpreet Kaur System Desig...

12/16/2018

30,746

Load-balancing, what you should really know

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...

11/21/2017

27,455

To Ping or not to Ping?

We are pleased to share with you all an interesting article contributed by Abdul Aziz Khan who is a Telecom Professional having more than 18 years of diverse Telecom Experience of Planning, Project Management, Optimization and Operations, he is currently working in Network Optimization team of Mobily KSA. Abdulaziz Khan Technical...

10/12/2017

23,937

What is Latency; A User’s Perspective

We are pleased to share with you all an interesting article contributed by Abdul Aziz Khan who is a Telecom Professional having more than 18 years of diverse Telecom Experience of Planning, Project Management, Optimization and Operations, he is currently working in Network Optimization team of Mobily KSA. Abdulaziz Khan Technical...

09/21/2017

21,173

BGP is SDN's best friend!

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

28,687

Segment-Routing (SPRING) - At a glance

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

27,127

Global Server Load Balancing (GSLB) for Enterprise: Part 1. Concept and Service Logic

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

44,491

Quick Guide to OSPF: Part 2. Redistributing External Network Routes into OSPF Network

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

43,604

Quick Guide to OSPF: Part 1. Building Shortest Path Tree Topology

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

51,915

IEEE 802.1X-based user authentication in KT, SK Telecom and LG U+'s Wi-Fi networks

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

81,470

Switching and Routing - Part 4. IP Forwarding by L3 Switch

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

65,702

Switching and Routing - Part 3. L2 (Ethernet) Switching by L3 Switch

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

99,703

Switching and Routing - Part 2. Packet Forwarding by IP Router

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

62,544

Switching and Routing - Part 1. Router Architecture

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

65,071

Switching and Routing for Dummies - IP Routing

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

65,790

Switching and Routing for Dummies - Ethernet Switching

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

70,370

What is DHCP Option 82?

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

54,512

DHCP Security Using a DHCP Proxy Agent

Last time when we introduced a DHCP proxy agent through our previous blog post dated in September 1. 2013, we mentioned that this DHCP proxy agent can offer the benefits of enhanced security. So, we will look into these security-related functions in more detail today. As shown in the figure below, if there is a DHCP proxy agent in a network, all DHCP messages (used in IP address allocation...

10/01/2013

46,223

What is a DHCP Proxy Agent?

Now that we know what DHCP relay agents are, we will find out another DHCP agent, a DHCP proxy agent today. What a DHCP relay agent does is simply relay broadcast DHCP packets (DHCP Discover/Request) to DHCP server(s) located in other subnets whenever it receives packets from a DHCP client residing in that same subnet. On the other hand, a DHCP proxy agent not only relays the DHCP packets...

09/01/2013

44,119

What is a DHCP Relay Agent?

We talked about the basic operations of DHCP in our previous blog post, "What is DHCP?”. Today, we will find out what kind of agent a DHCP relay agent is. Generally, DHCP messages are broadcasted. So, in order for the messages to be exchanged between a DHCP client (PC) and DHCP server, both the client and server have to reside on the same subnet. That is because routers do not fo...

08/01/2013

85,827

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