Characterizing the logical infrastr

Characterizing the logical infrastructure of a network involves documenting any strategies your customer has for network addressing and naming. Addressing and naming are
discussed in greater detail in Part II of this book, “Logical Network Design.”
When drawing detailed network maps, include the names of major sites, routers, network
segments, and servers. Also document any standard strategies your customer uses for
naming network elements. For example, some customers name sites using airport codes
(San Francisco = SFO, Oakland = OAK, and so on). You might find that a customer suffixes names with an alias that describes the type of device (for example, RTRfor router).
Some customers use a standard naming system, such as DNS, for IP networks, or
NetBIOS Windows Internet Naming Service (WINS) on Windows networks. In such
cases, you should document the location of the DNS and WINS servers and relevant
high-level configuration information.
You should also investigate the network layer addresses your customer uses. Your customer’s addressing scheme (or lack of any scheme) can influence your ability to adapt the
network to new design goals. For example, your customer might use unregistered IP
addresses that will need to be changed or translated before connecting to the Internet.
As another example, current IP subnet masking might limit the number of nodes in a
LAN or VLAN.
Your customer might have a goal of using route summarization, which is also called route
aggregationor supernetting. Route summarizationreduces routes in a routing table,
routing-table update traffic, and overall router overhead. Route summarization also
improves network stability and availability, because problems in one part of a network are
less likely to affect the whole internetwork. Summarization is most effective when
address prefixes have been assigned in a consistent and contiguous manner, which is
often not the case.
Your customer’s existing addressing scheme might affect the routing protocols you can
select. Some routing protocols do not support classless addressing, variable-length subnet
masking (VLSM), or discontiguous subnets. A discontiguous subnetis a subnet that is
divided, as shown in Figure 3-3. Subnet 108 of network 10 is divided into two areas that
are separated by network 192.168.49.0.

Kết quả (Việt) 1:

Characterizing the logical infrastructure of a network involves documenting any strategies your customer has for network addressing and naming. Addressing and naming arediscussed in greater detail in Part II of this book, “Logical Network Design.”When drawing detailed network maps, include the names of major sites, routers, networksegments, and servers. Also document any standard strategies your customer uses fornaming network elements. For example, some customers name sites using airport codes(San Francisco = SFO, Oakland = OAK, and so on). You might find that a customer suffixes names with an alias that describes the type of device (for example, RTRfor router).Some customers use a standard naming system, such as DNS, for IP networks, orNetBIOS Windows Internet Naming Service (WINS) on Windows networks. In suchcases, you should document the location of the DNS and WINS servers and relevanthigh-level configuration information.You should also investigate the network layer addresses your customer uses. Your customer’s addressing scheme (or lack of any scheme) can influence your ability to adapt thenetwork to new design goals. For example, your customer might use unregistered IPaddresses that will need to be changed or translated before connecting to the Internet.As another example, current IP subnet masking might limit the number of nodes in aLAN or VLAN.Your customer might have a goal of using route summarization, which is also called routeaggregationor supernetting. Lộ trình các tuyến đường summarizationreduces trong một bảng định tuyến,Cập Nhật bảng định tuyến lưu lượng truy cập, và tổng thể bộ định tuyến trên cao. Tuyến đường tổng hợp cũngcải thiện sự ổn định của mạng và tính sẵn sàng, bởi vì các vấn đề trong một phần của một mạng lướiít có khả năng ảnh hưởng đến toàn bộ internetwork. Tổng hợp là hiệu quả nhất khitiền tố địa chỉ đã được chỉ định một cách nhất quán và lục địa, đó làthường không phải là trường hợp.Lược đồ địa chỉ hiện tại của khách hàng có thể ảnh hưởng đến các giao thức định tuyến, bạn có thểchọn. Một số giao thức định tuyến hỗ trợ không giải quyết, chiều dài thay đổi mạng conmặt nạ (VLSM), hoặc discontiguous mạng con. Một subnetis discontiguous một con mà làchia, như minh hoạ trong hình 3-3. Subnet 108 của mạng 10 được chia thành hai khu vực đóđược tách ra bởi mạng lưới 192.168.49.0.