Accessing the WAN – Chapter 4 docx

... information –Bots within the organization –Theft of customer or employee data –Abuse of wireless network –System penetration –Financial fraud –Password sniffing –Key logging –Website defacement ... –Insider abuse of network access –Virus –Mobile device theft –Phishing where an organization is fraudulently represented as the sender –Instant messaging misuse –Denial of...

Ngày tải lên: 05/07/2014, 03:20

... the remote DCE, which decodes the signal back into a sequence of bits. The remote DCE then signals this sequence to the remote DTE.  The connection between the two DCE devices is the WAN ... request requires no authentication, then PPP progresses to the next level. –If an incoming PPP request requires authentication, then it can be authenticated using either the...

Ngày tải lên: 05/07/2014, 03:20

... as Frame Relay. –However, there are times when the benefits outweigh the cost of the leased line. The dedicated capacity removes latency or jitter between the endpoints. –Constant availability ... modem. The modem modulates the binary data into an analog signal at the source and demodulates the analog signal to binary data at the destination. The physical charact...

Ngày tải lên: 05/07/2014, 03:20

... LANs –A router on each LAN is the DTE. –A serial connection, such as a T1/E1 leased line, connects the router to the Frame Relay switch of the carrier at the nearest POP for the carrier. The ... statistics. –This command is also useful for viewing the number of BECN and FECN packets received by the router. The PVC status can be active, inactive, or deleted. –Once...

Ngày tải lên: 05/07/2014, 03:20

... Chapter 6 22 Where to Place ACLs  Standard ACL: In the figure, the administrator wants to prevent traffic originating in the 192.168.10.0/ 24 network from getting to the 192.168.30.0/ 24 ... If the packet is permitted by the tests, it is then processed for routing. –Outbound ACLs - Incoming packets are routed to the outbound interface, and then they are processed...

Ngày tải lên: 05/07/2014, 03:20

... connectivity through the residence. – Since the POTS splitter separates the ADSL and voice signals at the NID, there is usually only one ADSL outlet available in the house. – The user can install ... fiber in the trunks: –Reduces the number of amplifiers –Thin and lightweight—takes less space –Covers longer distances –Induces less or virtually no noise –Less lo...

Ngày tải lên: 05/07/2014, 03:20

... reassignment of the IP address to another client later, or for the client to get another assignment if the client moves to another subnet. Clients may also renew leases and keep the same IP address. ... clients. The problem is that the network clients typically are not on the same subnet as those servers. Therefore, the clients must locate the servers to receive services...

Ngày tải lên: 05/07/2014, 03:20

... for the external system.  Step 3. Narrow the scope –Determine if the problem is at the core, distribution, or access layer of the network.  Step 4. Gather symptoms from suspect devices –Use ... with the hubs of the stars linked to form the region. •interconnect the regions to form the core of the WAN. – Regions could be geographic, connecting between three...

Ngày tải lên: 05/07/2014, 03:20

... and then hurrying me to the top of the stairs, bid me go down directly, as I was wanted in the breakfast-room. I would have asked who wanted me: I would have demanded if Mrs. Reed was there; ... listening to the sound of the piano or the harp played below, to the passing to and fro of the butler and footman, to the jingling of glass and china as refreshments were hande...

Ngày tải lên: 22/01/2014, 01:20