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What are firewalls? Firewalls serve to protect an internal network from external attacks. These external threats can be hackers who need to steal data or computer viruses that
Features of FDM 1.The FDM channel carries only one phone circuit at a time. 2.If an FDM channel is not in sue then it is sits idle and cannot be used by other user
Random effects are the effects attributable to an infinite set of levels of the factor, of which only the random sample occur in the data. For example, the investigator may want t
PACKET SWITCHES: To span large distances or several computers, networks must removed shared phase with packet switches. Each switch moves whole packet from one connection to
The auxiliary port is used to link a modem to for dial backups.
Go Back ( GBN) Go back N ARQ is specific instance of the automatic repeat request protocols in which the sending process continues to send a number of frames specific
A modified NRZ code known as enhanced-NRZ (E-NRZ) operates on 7-bit words; inverting bits 2,3,6 and 7; and adding one parity bit to each word. The parity bit is chosen to make the
vulnerability Assessment
1. What does RIP stand for? 2. What metric does RIP use for Path Selection? 3. If the metric used by RIP exceeds this value for a route it is considered unreachable, effec
The term signaling is used to define communication about the network, as opposed to interaction that just uses the network. A computer uses signaling with reserved VCI/VPI numbe
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