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The OSI Model
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The Application layer of the OSI model is where users communicate with the computer. The Application layer is responsible for identifying and estab...
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Next-generation firewalls (NGFWs) and DMZ zones are two critical components of network security that work hand in hand to protect an organization's...
Network Address Translation - NAT
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Netflow Articles:
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SNMP (Simple Network Management Protocol) and Netflow are both popular protocols with admins, prized for their ability to give visibility over the ...
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Monitoring network traffic & bandwidth usage via Netflow is mandatory for any type and size network. Gaining visibility into user traffic, appl...
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This article will cover the basics of Netflow, including its use cases, Netflow supported devices, Netflow history, and variants. We’ll also dive i...
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VLAN Networks
VLAN Tagging - Understanding VLANs Ethernet Frames
We mentioned that Trunk Links are designed to pass frames (packets) from all VLANs, allowing us to connect multiple switches together and independently ...
VLAN Networks
Comparing Traditional Flat & VLAN Networks
Designing and building a network is not a simple job. VLANs are no exception to this rule, in fact they require a more sophisticated approach because of...
VLAN Networks
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If you've read our previous article The VLAN Concept - Introduction to VLANs then you should feel comfortable with terms such as 'VLAN', 'Sta...
VLAN Networks
InterVLAN Routing - Routing between VLAN Networks
This article deals with the popular topic of InterVLAN routing, which is used to allow routing & communication between VLAN networks. Our article an...
Routing
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This article covers basic OSPF concepts and operation. We explain how OSPF works, how OSPF tables are built on an OSPF-enabled router and their purpose ...
Routing
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This article explains how OSPF uses Link State Advertisement (LSA) to exchange information about the network topology between routers. When a router rec...
Routing
Routing Information Protocol - RIP
Routing Information Protocol (RIP) is a distance-vector routing protocol that is commonly used in small to medium-sized networks. It is one of the...
Routing
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Routing protocols were created for routers. These protocols have been designed to allow the exchan...
Cisco Firewalls
Understand & Configure NAT Reflection, NAT Loopback,...
This article examines the concept of NAT Reflection, also known as NAT Loopback or Hairpinning, and shows how to configure a Cisco ASA Firewall running ...
SASE & SD-WAN Networks
Key Features of a True Cloud-Native SASE Service. Se...
Secure Access Service Edge (SASE) is an architecture widely regarded as the future of enterprise networking and security. In previous articles we talked...
Windows Servers
Guide to Windows Server 2016 Hyper-V Hypervisor: New...
One of Windows Server 2016 highlights is the newer Hyper-V server that not only extends the hypervisor’s features and capabilities but also introduces a...
Windows Servers
Hyper-V Best Practices - Replica, Cluster, Backup Ad...
Hyper-V has proven to be a very cost effective solution for server consolidation. Evidence of this is also the fact that companies are beginning to move...