Accessing the WAN – Chapter 7 pot

... 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 characteristics of the local ... Public ITE 1 Chapter 6 12 Cisco Thai Nguyen Networking Academy WAN Physical Layer Standards  The WAN physical layer also describes the interface between the DTE and the DCE. –EIA/TIA-232...

... 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 local database ... ITE 1 Chapter 6 5 Serial Communication Standards  In a serial communication process. –Data is encapsulated by the sending router. The frame is sent on a physical medium to the WAN. –There...

... 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 service –Unauthorized ... have access to the network. –However, the security policy should treat each of these groups differently. –Each group should only be shown the portion of the policy appropriate to their work and...

... 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 through the ... first filters on the source address, then on the port and protocol of the source. It then filters on the destination address, then on the port and protocol of the destination, and makes a final ... ITE 1 Chapter 6 37 Applying Standard ACL to Interfaces  Example 2: an ACL that denies a specific host. The first command deletes the previous ACL 1. The next ACL statement, denies the PC1...

... 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 ... ADSL service. –POTS splitters separate the DSL traffic from the POTS traffic. The POTS splitter is a passive device. Splitters are located at the CO and, in some deployments, at the customer ... 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 loss of signal –Immune to...

... 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 and 10 areas, and the hub ... 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 ... or failure. – At one extreme is the theorist, or rocket scientist, approach. • The rocket scientist analyzes and reanalyzes the situation until the exact cause at the root of the problem has...

... fa0 172 .16.1.0/24 172 .16.2.0/24 172 .16.3.0/24 172 .16.4.0/24192.168.1.0/24.1.1 .2.1.1.1.2 172 .16.10.0/24 lo1 172 .16.20.0/24 lo2 172 .16.30.0/24 lo3 172 .16.40.0/24 lo422 The Default RouteRouterB(config)#ip ... 172 .16.2.203:12:45: RT: add 172 .16.3.0/24 via 172 .16.2.2, static metric [1/0]RouterA(config)#Router B Router CRouter As0s0 s0s1fa0 fa0 fa0 172 .16.1.0/24 172 .16.2.0/24 172 .16.3.0/24 172 .16.4.0/24192.168.1.0/24.1.1 ... 172 .16.0.0 10101100 00010000 00000000 00000000 36 The last of the Supernets – 0.0.0.0/0RouterB#show ip route 172 .16.0.0/24 is subnetted, 3 subnetsR 172 .16.1.0 [120/1] via 172 .16.2.1,...