|
|
|
Who's Online
There currently are 5976 guests online. |
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
I was impressed with the quality of service (frequent e-mails to let you know the status of your order), and the speed at which the download became available. The manual was a life saver and was not easy to track down. Thank you for such an excellent service.
;
the manual was just what i wanted it had all the revelent information required to operate the hifi .Iwould use any manual i downloaded for any item which needs a manual
;
Die gewünschte Bedienungsanleitung wurde vereinbarungsgemäß in deutsch bereitgestellt. Sie ist gut lesbar. Kein Kauderwelsch.
Danke für den Service.
;
GOOD SERVICE MANUAL GOT ALL THE INFO. THAT I NEEDED..
;
Excellent product and service. I bought a second-hand Casio CPS-60 keyboard which had no manual. Packed full of features which I had no idea how to operate . . .
Google search found this site (and others with the same manual for sale for $8.99!)
I bought the manual and within an hour the download was available. Quality of the scanned images is good - very clear - and the PDF has been created with the pages in the correct order.
I would definitely use this site again.
5-6
CHAPTER 5: TRANSPARENT BRIDGING
Spanning Tree and the Bridged Network
When transparent bridges are used to attach networks with redundant links, packets can loop and rapidly multiply on the attached LANs. These additional packets create traf�c that might unnecessarily clog the LAN. A loop exists if more than one path can be used to forward a packet from one station to another. To solve this problem, IEEE 802.1d bridging includes Spanning Tree Protocol, an algorithm that dynamically maps out a loopless network topology (a subset of the entire topology), ensuring that only one active path exists between every pair of LANs.
Packet Looping in a Bridged Network
Loops can occur on a bridged network for various reasons. In a network where reliability is key, network administrators often implement redundant links so that, although individual bridges might fail, the �networks� (data pathways) between stations remain active. Loops can also occur by accident. For instance, when more than one bridge is used to connect various LANs, the network manager might inadvertently con�gure the extended network with loops, causing packets to be circulated inde�nitely. A potential example of packet looping is shown in Figure 5-3. In this example: 1 Packet 1 is transmitted on LAN 1. 2 Bridges A, B, and C (connected to both LAN 1 and LAN 2) receive Packet 1 and forward it onto LAN 2, creating packets 1a, 1b, and 1c, respectively. 3 Bridge A receives Packets 1b and 1c on LAN 2 and forwards them onto LAN 1; at the same time, Bridge B receives Packets 1a and 1c on LAN 2 and forwards them onto LAN 1. Bridge C follows this same pattern. When multiple bridges receive the same packet, they each transmit a new copy of the packet onto the attached LANs. Consequently, the packets will loop and multiply inde�nitely as they traverse the bridges.
|
|
|
> |
|
