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_6/buttons.html | 110 +++++++++++++++++++++ Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_6/content.html | 73 ++++++++++++++ Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_6/index.html | 29 ++++++ Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_6/media.html | 21 ++++ 4 files changed, 233 insertions(+) create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_6/buttons.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_6/content.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_6/index.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_6/media.html (limited to 'Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_6') diff --git a/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_6/buttons.html b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_6/buttons.html new file mode 100644 index 0000000..03085d1 --- /dev/null +++ b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_3_6/buttons.html @@ -0,0 +1,110 @@ + + + + + + + + + + + +New Page 1 + + + + + + + + + + + + + + + + + + + + + + + + +
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+ + 2.3 + WAN Design 
  + 2.3.6 + Other WAN design considerations 
+ + + + + + +
+ + Many enterprise WANs will have connections to the Internet. This + poses security problems but also provides an alternative for + inter-branch traffic.

Part of the traffic that must be considered during design is going to + or coming from the Internet. Since the Internet probably exists + everywhere that the enterprise has LANs, there are two principal ways + that this traffic can be carried. Each LAN can have a connection to + its local ISP, or there can be a single connection from one of the + core routers to an ISP. The advantage of the first method is that + traffic is carried on the Internet rather than on the enterprise + network, possibly leading to smaller WAN links. The disadvantage of + permitting multiple links, is that the whole enterprise WAN is open to + Internet-based attacks. It is also difficult to monitor and secure the + many connection points. A single connection point is more easily + monitored and secured, even though the enterprise WAN will be carrying + some traffic that would otherwise have been carried on the Internet.

If each LAN in the enterprise has a separate Internet connection, a + further possibility is opened for the enterprise WAN. Where traffic + volumes are relatively small, the Internet can be used as the + enterprise WAN with all inter-branch traffic traversing the Internet. + Securing the various LANs will be an issue, but the saving in WAN + connections may pay for the security.

Servers should be placed closest to the locations that will access + them most often. Replication of servers, with arrangement for off-peak + inter-server updates, will reduce the required link capacity. Location + of Internet-accessible services will depend on the nature of the + service, anticipated traffic, and security issues. This is a + specialized design topic beyond the scope of this curriculum. + +

  

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