From 33613a85afc4b1481367fbe92a17ee59c240250b Mon Sep 17 00:00:00 2001 From: Sven Eisenhauer Date: Fri, 10 Nov 2023 15:11:48 +0100 Subject: add new repo --- Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2/buttons.html | 110 ++++++++++++++++++ Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2/content.html | 129 +++++++++++++++++++++ Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2/index.html | 29 +++++ Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2/media.html | 21 ++++ 4 files changed, 289 insertions(+) create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2/buttons.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2/content.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2/index.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2/media.html (limited to 'Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2') diff --git a/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2/buttons.html b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2/buttons.html new file mode 100644 index 0000000..ef37094 --- /dev/null +++ b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_2/buttons.html @@ -0,0 +1,110 @@ + + + + + + + + + + + +New Page 1 + + + + + + + + + + + + + + + + + + + + + + + + +
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+ + 2.3 + WAN Design 
  + 2.3.2 + Steps in WAN design 
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Designing a WAN can be a challenging task, but + approaching the design in a systematic manner can lead to superior + performance at a reduced cost. Many WANs have evolved over time, + therefore many of the guidelines discussed here may not have been + considered. Every time a modification to an existing WAN is + considered, the steps in this module should be followed. WAN + modifications may arise from changes such as an expansion in the + enterprise the WAN serves, or accommodation of new work practices and + business methods.

+

Enterprises install WAN connectivity + because there is a need to move data in a timely manner between + external branches. The WAN is there to support the enterprise + requirements. Meeting these requirements incurs costs, such as + equipment provisioning and management of the data links.

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In designing the WAN, it is necessary to know what data traffic must + be carried, its origin, and its destination. WANs carry a variety of + traffic types with varying requirements for bandwidth, latency, and + jitter.

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For each pair of end points and for each traffic type, information is + needed on the various traffic characteristics. + Determining this may + involve extensive studies of and consultation with the network users. + The design often involves upgrading, extending, or modifying an + existing WAN. Much of the data needed can come from existing network + management statistics.

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Knowing the various end points allows the selection of a topology or + layout for the WAN. The topology will be influenced by geographic + considerations but also by requirements such as availability. A high + requirement for availability will require extra links that provide + alternative data paths for redundancy and load balancing.

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With the end points and the links chosen, the necessary bandwidth can + be estimated. Traffic on the links may have varying requirements for + latency and jitter. With the bandwidth availability already + determined, suitable link technologies must be selected.

+

Finally, installation and operational costs for the WAN can be + determined and compared with the business need driving the WAN + provision.

+

In practice, following the steps shown in + Figure is seldom a linear + process. Several modifications may be necessary before a design is + finalized. Continued monitoring and re-evaluation are also required + after installation of the WAN to maintain optimal performance.

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+ + + Interactive Media Activity

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Drag and Drop: WAN Design Steps

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When the student has completed this activity, the student + will be able to identify the basic steps in designing a WAN.

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