From c9935eb6a8937bc97471c572e8b239e1a84f5d98 Mon Sep 17 00:00:00 2001 From: Pedro Gomes Date: Tue, 13 Mar 2018 22:46:26 +0100 Subject: [PATCH 1/3] update readme fix text about attacks WAF protects against. Clarify R53 simple routing policy --- README.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 51f6d36..189c695 100644 --- a/README.md +++ b/README.md @@ -562,7 +562,7 @@ Using Access Key ID and Secret Access Key – can be used only via accessing pro - Restrict viewer access for S3 and CDN using pre-Signed URLs or Signed cookies. E.g. You can view video only using that URL - - Using Web Application Firewalls to prevent SQL injection, CSS attacks + - Using Web Application Firewalls to prevent SQL injection, XSS attacks - For https access, you can either use default CloudFront certificate or own certificate can be imported via ACM. @@ -1029,7 +1029,7 @@ e.g. [https://www.tcpiputils.com/dns-lookup/google.com/ALL](https://www.tcpiputi Most of the questions are scenario based. -1. Simple - Default - when a single resource performs function for your domain - only one webserver serves content +1. Simple - Default - When you have a single resource available or wish to use DNS round robin between available resources. 2. Weighted – send x% of traffic to site A and remainder (100 – x) % of it to site B. Need not be two different regions. Can be even two different ELBs. This split is over length of day not based on number of individual subsequent requests. From 24265953002cfa934389a91dd8147050893cc042 Mon Sep 17 00:00:00 2001 From: Pedro Gomes Date: Tue, 13 Mar 2018 23:09:16 +0100 Subject: [PATCH 2/3] update multi az text --- README.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 189c695..d3ac59b 100644 --- a/README.md +++ b/README.md @@ -1049,6 +1049,8 @@ How will the users get the best experience? – evaluated dynamically by R3. 5. Geo-location – Choose where to route traffic based on geographic location of users. +6. Traffic Flow - Visually create complex set of dns records based on all the options above. + Different from Latency based as the routing is hardwired irrespective of latency. ## DNS Exam Tips @@ -1163,7 +1165,7 @@ OLTP systems. - In case of failover, No need to change connection string. - - This can be used for DR purpose only. This option has to be selected at instance creation time. This option is not useful for improving performance / scaling. + - Can be used for DR purposes only. Does not improve performance / scaling. ### Read Replica Databases. From 565ca0bed4fd85e07762ec63c36f42df2a1ec0fb Mon Sep 17 00:00:00 2001 From: Pedro Gomes Date: Tue, 13 Mar 2018 23:14:59 +0100 Subject: [PATCH 3/3] update dynamo Amazon DynamoDB is highly available, with automatic and synchronous data replication across three facilities in an AWS Region. https://aws.amazon.com/dynamodb/details/ --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index d3ac59b..3d7220a 100644 --- a/README.md +++ b/README.md @@ -1203,7 +1203,7 @@ OLTP systems. - Stored on SSDs - - Stored on 3 geographically distinct DCs (not AZs). Built in redundancy + - Built in redundancy, data is replicated across 3 Availability Zones. - Consistency