rdlc qr code

rdlc qr code

rdlc qr code

rdlc qr code

rdlc qr code

rdlc qr code,

rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,

rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,

rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,
rdlc qr code,

There are many ways to reduce the overhead of IPX-based communications on an internetwork You will get the best return immediately by setting up an access list that restricts transmission of SAPs over the wide area link to only those that are absolutely necessary A typical access list and its application are shown as follows: interface Ethernet0 ipx input-sap-filter 1000 ! access-list 1000 permit 123000000000001 4 The first entry is part of the configuration for the Ethernet 0 port, and applies access list number 1000 to any packets coming into this port The second section is the access list itself This access list permits the device on network 123 with the IPX address of 000000000001 to pass type-4 SAPs only If the 4 were omitted, the list would allow the Ethernet port to pass all SAPs from this device Clearly this device is a NetWare server, as all NetWare servers use the value 000000000001 for their internal node address The result of applying this access list is that computers on the other end of this WAN link will hear only about this server on network 123 This is what is known as a SAP access list, and is identified as such because it is numbered in the 1000 1099 SAP li b li d i fil If hi li b i

2168311126 2168311190

2168311127 2168311191

Permit 16011xx network all access out Permit return traffic inbound (implicit deny all) We now have a simple policy definition In the above policy, return traffic indicates traffic that is inbound from the Internet in response to a TCP/IP conversation initiated from inside hosts Recall that TCP/IP conversations are two-way, so we must allow legitimate responses from hosts on the Internet to conversations initiated by hosts on our inside network The next factor that must be determined is the interface on which to place the access list and the direction we wish to filter The general rule of thumb when determining which interface to place an access list on are Place standard access lists as close to the destination as possible Place extended access lists as close to the source as possible The logic for these rules is fairly straightforward A standard access list uses only the source address to determine whether a packet is to be permitted or denied If a standard access list is placed too close to the source, packets that we would wish to include would be blocked In Figure 7 9, we wish to prevent workstation A from accessing server number 3

This section has introduced you to the concept of subnetting, which you will need to know for the Network+ exam So make sure you are familiar with identifying the class addresses and then have a solid understanding of subnetting!

.

Be sure to check out the exercises in LabBookpdf found on the CD-ROM for more practice on subnetting

4 focused on introducing you to the different class IP addresses: class A, class B, and class C Each IP address that you use on a system falls into one of these three classes this is known as classful addressing Table 5-1 summarizes the three major address classes

Figure 7 9: In this example, we have four potential interfaces on which we could place the access list

tabLe 5-1