Enterprise network infrastructure
1. small business network:
user terminals - switch - exit router --WAN (wide area network) wide area network;
2. General Enterprise Network:
three compact models, hierarchical conducive to expansion and management of the network.
1) Access Layer
: Layer 1, the device of this layer is mainly
an access layer switch
for access to corporate terminal equipment, such as: PC, AP, IP phones, servers and the like.
2) aggregation layer /
distribution layer
:
second layer, this layer device mainly
router
sends traffic for all devices within the network lower layer convergence, including a gateway configured to achieve, VLAN Interface (Interface) configuration, and so on interworking between different VLAN.
(Cluster scene in the service convergence layer, also known as distribution layer)
3) the core layer:
Layer 3, the device of this layer is typically
a router
or a
high-performance three-core switches
, etc., fast forwarding data sent by the convergence layer, the core layer through
the gateway device
forwards the data to the wide area network WAN.
3. Service cluster architecture:
For large enterprises, there will be a separate server clusters, and employees to the office of general equipment area, its structure is generally the access layer - distribution layer - the core layer - a cluster of servers.
Visitors over the Internet - a gateway - access server resources, distribution layer core switches will be responsible for distributing access to a lot of traffic to each server.
note:
In practice, some small units will core layer and the core layer is a convergence layer were combined, the following access layer.
There is to be noted that the figures are more layers of the device, which played a role redundancy, enhanced network stability.
to sum up:
1) Networking Small Businesses and large enterprise networks What is the difference?
Small business networks are generally not hierarchical, tiered large enterprise networks.
2) The basic idea of large-scale enterprise network design?
Such as stability (redundancy), scalability, security (firewall, intrusion detection, load), to purchase multiple ISP business (Unicom, Telecom)
