What is the maximum amount of throughput provided by an OC 12?
What two competing standards exist for cell phone networks?
As mobile phone technologies have evolved, providers in different countries have chosen different communication standards for their mobile phone networks. In the US, both of the two competing standards exist: GSM (used by AT&T and T-Mobile) and CDMA (used by the other major carriers).
What is the size of an ATM packet?
Asynchronous transfer mode (ATM) provides high-speed switching functions. An ATM packet is called an ATM cell of 53 octets, which consists of control information and data. In a packet switching system, the packet size is variable.
At what two layers of the OSI model are LAN and WAN protocols likely to differ?
LANs and WANs differ on the layer 1 a 2 of the OSI model in access methods, topologies, and sometimes media. In a PON setup, the system is considered passive because no repeaters or other devices intervene between the carrier and the customer.