Switch

https://www.google.co.za/#hl=en&tbo=d&output=search&sclient=psy-ab&q=layer-3+swithc+wikipedia&oq=layer-3+swithc+wikipedia&gs_l=hp.3..0i13i30l2j0i13i5i30l2.862.7913.0.8174.36.28.0.0.0.3.892.14023.5-12j8.20.0.les%3B..0.0...1c.1.1DHYj5CYFRY&pbx=1&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.&bvm=bv.1355534169,d.d2k&fp=b21b4374209baa2b&bpcl=40096503&biw=1366&bih=604
http://en.wikipedia.org/wiki/LAN_switching#Layer_3_switching
http://en.wikipedia.org/wiki/Comparison_of_stackable_switches
http://en.wikipedia.org/wiki/Comparison_of_stackable_switches
http://en.wikipedia.org/wiki/Virtual_security_switch
http://www.orbit-computer-solutions.com/How-To-Configure-Switch-Security.php
==== Daisychain or switched hops ===
http://itknowledgeexchange.techtarget.com/itanswers/maximum-number-of-switched-hops-in-a-network/
avoid daisy-chaining switched network
Maximum Number of switched hops in a network
Trying to get a definitive answer on how many switched hops you can put in a network. I'm trying to reach a portion of our building, that with the bends and twists and turns in the wiring, I'd be looking at about 400 - 500 feet straight through. I do already have three switched hops from my server to the end point now (server -> hop1 -> hop2 -> hop3). According to the research I've already found from googling and my own knowledge, the 5-4-3-2 rule wouldn't apply anymore because of the switches in play. I'm not worried about capacity as there are only a few users connected to each switch. Latency I wouldn't imagine would be too horrible. So, can you confirm, deny, or answer: How many hops can I truly do? Would latency be a big problem? Am I correct in assuming distance is no longer a factor because no single hop is over 100m? Thank you in advance for your help!! -Dustin 
=== Max number or switches in newtork ===
http://itknowledgeexchange.techtarget.com/itanswers/how-many-switches-can-you-have-in-a-network/
I don't think there is any limitation in the number of switches you can put in a network; however, you need to consider complexity, added delays, connectivity, and port density when you calculate the number of switches you want in your network. The more switches you have, the more chances there are to break down the spanning tree protocol which would bring down all the services. So you need to be practical and base the optimum number of switches for your network on your business needs. Hope this helps. Be aware that adding switches enlarges your broadcast area, so it might produce more problems than you want with additional traffic and possible faulty NICs and hardware. ====================================== There is no limitation to how many switches you can have, but you don't want too many switches in a daisy chain. That will start causing latency issues. If you need more ports, look into a larger core switch like the Cisco 4500 or 6500 series.
=== dslam ===
http://www.impactisp.co.za/D%20Link%2048%20port%20Standalone%20IP%20DSLAM%20with%20built%20in%20A
http://www.draytek.co.za/
http://www.compsource.com/ttechnote.asp?part_no=MX160&vid=2201&src=PW
http://www.zhone.com VDSL2 manufacturer listed on compsource for retail market.
http://en.wikipedia.org/wiki/VDSL2
http://www.dsl-warehouse.com/index.php?cPath=56/?&plk=pi-4-hs3-m&gclid=CNqaxMH0uLQCFZMftAodtHAAOQ
http://96prices.com/Zhone%20Dslam?gclid=CNGEq8T0uLQCFePHtAodqx4AFQ
=== VDSL Ethernet extenders ===
http://www.dsl-warehouse.com/product_info.php?cPath=56&products_id=319&osCsid=3f86e1f5f4f131ec09f342529f30629d
DCE 5201V-BM High Speed VDSL2 Ethernet Extender
The DCE 5201V-BM is also a Long Reach Ethernet (LRE) converter providing one RJ-45 Ethernet port and one RJ-11 phone jack that is for VDSL2 connection. By using the additional Splitter from the package of a 5201V-BM, the splitter can provide POTS splitter to share the existing phone line with POTS; therefore it is no need of replacing the existing copper wiring. Just plug the DCE/5201V-BM with additional splitter into the existing RJ-11 telephone jack and a high-performance VDSL2 network can be connected. The DCE 5201V-BM is ideal to be used as an Ethernet extender to an existing Ethernet network. $245 dollar
=== VDSl over co-axial cable ===
http://www.dsl-warehouse.com/product_info.php?cPath=56&products_id=295&osCsid=3f86e1f5f4f131ec09f342529f30629d
see video, transmits IP camera data upto 3km over co-ax cable 
=== 24port VDSL2 planet dslam ===
http://www.dsl-warehouse.com/product_info.php?cPath=56&products_id=264&osCsid=3f86e1f5f4f131ec09f342529f30629d
=== VDSL bridge modem with 4 ethernet ports ===
http://www.dsl-warehouse.com/product_info.php?cPath=56&products_id=314&osCsid=3f86e1f5f4f131ec09f342529f30629d
=== VDSL 8 port managed switch ===
http://www.dsl-warehouse.com/product_info.php?cPath=56&products_id=319&osCsid=3f86e1f5f4f131ec09f342529f30629d
High Performance VDSL2 Data Rate over Existing Phone Lines
PLANET VC-820M is an 8-Port VDSL2 Managed CO Switch (Central Office) with 2-Port Gigabit TP / SFP combo interfaces. The VDSL2 CO Switch is perfectly designed for the networking applications of Community, Network service provider, SI (System Integration), IP Surveillance provider and etc. It is based on two core networking technology, Ethernet and VDSL2 (Very-high-data-rate Digital Subscriber Line 2). By co-working with PLANET developed VDSL2 CPE (Customer Premises Equipment) – the VC-23x series CPE, it offers the absolutely fastest data transmission speeds over existing copper telephone lines which provides the ideal solution in the last mile.