Network devices

1. Network Devices
*

2. Network operating system

3. NX-OS is a network operating system designed by Cisco Systems for its own
Nexus-series Ethernet switches and MDS-series Fibre Channel storage area
network switches. NX-OS is designed to support high performance, high
reliability server access switches used in the data center. NX-OS evolved from the
Cisco MDS operating system, SAN-OS. SAN-OS was originally developed for the
MDS line of switches.

4. Switch Vs Router

5. Network Switch

6. Cisco Catalyst
Catalyst is the brand name for a variety of network switches sold by Cisco Systems.
While commonly associated with Ethernet switches, a number of different interfaces
have been available throughout the history of the brand. Cisco acquired several
different companies and rebranded their products as different versions of the
Catalyst product line. The original Catalyst 5000 and 6000 series were based on
technology acquired from Crescendo Communications. The 1700, 1900, and 2800
series Catalysts came from Grand Junction Networks, and the Catalyst 3000 series
came from Kalpana in 1994.[1]
In addition, Cisco increasingly offers routers with switching capabilities; for example
the Cisco 7600 series routers and the Catalyst 6500 series L3–switches have
interchangeable parts. Even Cisco′s smaller routers, including their newest “ISR”
series, can have switch modules installed in them, basically making Cisco′s smaller
switches fully integrated devices.

7. OS
Operating systems
In most cases, the technology for the Catalyst Switch was developed separately from
Cisco′s router technology. The Catalyst switches originally ran software called CatOS
rather than the more widely known Cisco IOS software used by routers.
However, this has changed as the product lines have merged closer together. In some
cases, particularly in the modular chassis switches, a configuration called 'Hybrid' has
emerged - this is where the layer 2 functions are configured using CatOS, and the layer 3
elements are configured using IOS. 'Native IOS' can also be found with newer software
versions that have eliminated CatOS entirely in favor of IOS, even on hardware that
originally required CatOS.
The latest version of IOS for the Catalyst 6500 series is 12.2(33)SXJ which enables In-
Service Software Upgrade (ISSU) via IOS Software Modularity and 15.1.1-SY.
Some newer Catalyst switch models (with recent versions of the Cisco IOS) also allow
configuration via web-based graphical interface (GUI) module which is hosted on a HTTP
server located on the switch. The IOS config-mode command 'ip http-server' will enable
this style of configuration. In series 12.x IOS, 'ip http-server' is always on as a factory
default. The Catalyst 3750-series of switches is an example of a Cisco Catalyst switch
that allows this style of GUI configuration via HTTP.

8. Interface
As Catalyst devices are primarily Ethernet switches, all modern Catalyst models have
Ethernet interfaces, ranging from 10 Mbit/s to 10 Gbit/s depending on the model. Some
models can accommodate Asynchronous Transfer Mode interfaces which can be used to
bridge Ethernet traffic across wide area networks. Other models can support T1, E1, and
ISDN PRI interfaces to provide connections to the PSTN. Legacy models supported a
variety of interfaces, such as token ring, FDDI, and 100BaseVG, but are no longer sold by
Cisco Systems.
Most models have basic layer 2 functions and are capable of switching Ethernet frames
between ports. Commonly found additional features are VLANs (Cisco proprietary ISL or
IEEE 802.1Q), trunking and QoS or CoS. The switches, whether IOS or CatOS, are fully
manageable.
Many Catalysts that run IOS are also capable of functioning as a router, making them
layer 3 devices; when coupled with TCP and UDP filtering, these switches are capable of
layer 2-4 operation. Depending on the exact software image, a Catalyst that runs IOS
may be able to tackle large-scale enterprise routing tasks, using router technologies like
OSPF or BGP.

16. The 1000 switch family is considered an edge device, having many functionalities that can
be built as the device is very modular. The 1900 line as a whole is past end-of-sale and
end-of-life, and is considered a retired product line.[4]
The inside of a Cisco 1900-series switch
1700: 24 10BaseT ports, 1 switchable MDI/MDIX uplink 10baseT/AUI/BNC port, and 2
Fast Ethernet ports. Runs neither CatOS nor IOS. Is a first-generation carryover from
Cisco's acquisition of Grand Junction Networks.
19xx: 12 or 24 10BaseT ports and 2 Fast Ethernet ports. ISL trunking on the 100
Mbit/s ports. Runs neither CatOS nor IOS.
The Cisco Catalyst 3000 and 3100 series switches are switches for use in blade-enclosures:
the Catalyst 3032 is a Layer2 switch and the Catalyst 3130x and 3130G are blade-switches
for the Dell M1000e enclosure.
The Cisco Catalyst 4500 Series is a mid-range modular chassis network switch. The system
comprises a chassis, power supplies, one or two supervisors, line cards and service
modules. The Series includes the E-Series chassis and the Classic chassis which is
manufactured in four sizes: ten-slot, seven-slot, six-slot, and three-slot.
The Cisco Catalyst 4900 series is a fixed-configuration switch. Uplink interfaces are either
SFP ports or 10 Gigabit Ethernet, with 48 copper ports of 10/100/1000 Ethernet.
The Cisco Catalyst 5500 Series and Cisco Catalyst 5000 Series is a chassis-based switch
family. The Cisco Catalyst 5000 Series is acquired from another company. This entire series
has now reached end-of-sale.
The Cisco Catalyst 6500 Series is a chassis-based switch family. This series can support
interfaces up to 10 Gigabit Ethernet in speed and redundant Supervisor modules.

34. Cisco Data Products
Datacenter products: Nexus Switches (1000v, 2000, 3000, 4000, 5000, 6000,7000,
9000), MDS, Unified Computing System (UCS)
Routers, including: 800 Series, Integrated Services Router (ISR) (1800, 2800, 3800), ISR
G2 (1900, 2900, 3900), 2500 Series, 7200, 7600, 12000, ASR (900, 1000, 9000), Network
Convergence System (NCS) 6000, and Carrier Routing System (CRS-1, CRS-3, CRS-X)
Security appliances: ASA 5500, PIX 500 series, Cisco Security Manager, Email Security
Appliance (ESA), Web Security Appliance (WSA), Content Security Management
Appliance (SMA)
Catalyst switches: 1900 Series, 2900 / 2950 / 2960 / 3500XL Series, 3550 / 3750 Series,
3000 Series, Catalyst 4500/4900, 5000/5500 Series, 6500 Series, 6800 Series
Teleworker/Remote Connectivity—Cisco LAN2LAN Personal Office for ISDN, VPN 3000
Concentrators
Cisco Wireless LAN products—Access Points, PCI/PCMCIA/USB Wireless LAN Adaptors,
Wireless LAN Controllers (WLC), Wireless LAN Solutions Engines (WLSE), Wireless
Control System (WCS), Location Appliances, Long range antennas.

35. D-Link Switch features

36. D-Link Switch features

37. D-Link Switch features

49. D-Link Corporation (Chinese: 友訊科技) is a Taiwanese multinational networking
equipment manufacturing corporation headquartered in Taipei, Taiwan. It was founded in
March 1986 in Taipei as Datex Systems Inc.[1] It began as a network adapter vendor and
has gone on to become a designer, developer, and manufacturer of networking solutions
for both the consumer and business markets.
In 2007, it was the leading networking company in the small to medium business (SMB)
segment worldwide with 21.9% market share.[2] In March 2008, it
became the market leader in Wi-Fi product shipments worldwide, with 33% of the total
market.[3] In 2007, the company was featured in the "Info Tech 100", a listing of the
world's best IT companies. It was also ranked as the 9th best IT company in the world for
shareholder returns by BusinessWeek