| TECH |
Techable（テッカブル） |
大規模言語モデルの学習をクラウド上で実行！安全な生成AI開発のための「AI Model Studioサービス」 |
https://techable.jp/archives/218118
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提供開始 |
2023-08-26 09:00:27 |
| python |
Pythonタグが付けられた新着投稿 - Qiita |
[Python / numpy] np.datetime64 型のデータを ビルトインの datetime.datetime 型にしたい時 |
https://qiita.com/siruku6/items/fd06bae1da813d4a25c7
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orttimedeltanptodaynpdate |
2023-08-26 18:30:11 |
| AWS |
AWSタグが付けられた新着投稿 - Qiita |
AWS WAF ベーシックな設定について |
https://qiita.com/honey416x2/items/df339dd02989e05c2b8a
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amazonwebservicesaws |
2023-08-26 18:19:40 |
| 海外TECH |
DEV Community |
From Data to Frame: The Evolution of PDUs Across the OSI Model |
https://dev.to/stungnet/from-data-to-frame-the-evolution-of-pdus-across-the-osi-model-21gd
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From Data to Frame The Evolution of PDUs Across the OSI Model IntroductionIn a recent exploration I delved into the intricacies of the OSI model detailing the distinct roles played by each layer throughout the networking stack If you haven t had the chance to read that article I recommend starting there Unpacking The OSI Model Building on that foundation this article aims to dive deeper specifically focusing on the Protocol Data Units PDUs across the OSI layers illuminating their operations and their crucial encapsulations So let s commence by starting at the layer you interact with the Application Layer Application Layer Layer DataWithin the Application Layer the PDU is referred to simply as Data This data is raw and unstructured Meaning it is the user s actual message the file they re transferring the content of the webpage they re accessing or even the video they re streaming As this data descends the networking stack it undergoes layers of encapsulation only to be de encapsulated at its destination reverting to its original unadulterated form Presentation Layer Layer DataThe PDU within the Presentation layer is still known as Data though the Data doesn t remain the same raw data we have in the Application Layer This Data gets reformatted for compatibility encrypted for security and compressed for transmission speed The process here sets the stage for its journey further through the stack Session Layer Layer DataWithin the Session Layer our PDU is still recognized as Data marking its final appearance under this name This layer is crucial in orchestrating the rhythm of communication it not only establishes maintains and terminates sessions between two devices but also ensures the synchronization and structured management of the data being transferred It s here that the mechanics of dialogue come into play guaranteeing that the conversation between devices remains harmonious and coordinated Transport Layer Layer Segment DatagramAt the Transport Layer our PDU evolves distinctly transitioning from the generalized Data to either Segment within the realm of TCP or Datagram when dealing with UDP This transformation is pivotal to end to end communication as data is systematically divided into segments or datagrams for efficient transport the PDU gains these essential attributes encapsulated within what s known as the L Header Transport Layer Header L Header Type of PDU Data is categorized as either Segment TCP or Datagram UDP Port Numbers PDUs are endowed with source and destination port numbers to guide the data to its designated application Sequencing Every PDU receives a unique sequence number safeguarding the order of data upon its arrival Network Layer Layer PacketAt the Network Layer our evolving PDU gains another vital header morphing it into what we recognize as a Packet This transformation isn t merely structural the new header equips the packet with essential attributes to navigate the vast topology of interconnected networks Specifically it incorporates logical addressing IP addresses routing indicators and other metadata that routers and switches utilize to determine the packet s optimal path through the network This layer ensures that each packet regardless of its source or the path it takes will find its way to its intended destination Network Layer Header L Header Logical Addressing The introduction of source and destination IP addresses Lifetime Management Incorporation of the TTL field Service Type Specification The addition of the ToS field Header Integrity Implementation of the header checksum Protocol Specification Insertion of the protocol number Packet Size Management Fragmentation and reassembly details added Data Link Layer Layer FrameAt the Data Link Layer our PDU is framed and readied for its voyage across the local network This encapsulation introduces the frame s local address guiding it toward its destination within the immediate network Moreover mechanisms such as error checking ensure its safe transit Data Link Layer Header Frame Header Source MAC Address A unique identifier hardwired into the sending device s network interface card Destination MAC Address The physical address of the intended recipient within the local network Type Length Field Indicates either the type of protocol encapsulated within or the frame s length Data Link Layer Trailer Frame Trailer Frame Check Sequence FCS A CRC based value calculated from the frame s content ensuring transmission accuracy Physical Layer Layer BitsEntering the foundational depths of our OSI journey we reach the Physical Layer Here our meticulously crafted frame is translated into electrical pulses optical signals or radio waves depending on the transmission medium It s not about the content anymore it s about the signal and its representation This layer doesn t concern itself with headers or PDUs it simply transmits raw binary data one bit at a time ConclusionAs we journeyed through the OSI model we ve observed data undergoing encapsulation layer by layer prepped for its digital voyage But this is only half the tale For the end user to interact with this data the reverse occurs De encapsulation systematically peels away the headers restoring the data to its original form at the Application Layer However it s worth noting that while the OSI provides a structured blueprint it s primarily a conceptual model In practice data handling might not always align perfectly with each OSI layer s defined function In every online exchange it s these rapid detailed processes that make our digital communications possible Truly it showcases the wonders of today s network technologies Thank you for joining me on this exploration and I appreciate your time spent reading In my upcoming blog post I ll delve deeper into this subject using Packet Tracer offering a hands on simulated exploration of networking intricacies Stay tuned for a dynamic journey through virtual network configurations |
2023-08-26 09:21:44 |
| 海外TECH |
DEV Community |
Overcoming Terraform Deployment Challenges: How to fix authorization issues using Service Principal on Azure Cloud |
https://dev.to/oruchepaschal/overcoming-terraform-deployment-challenges-how-to-fix-authorization-issues-using-service-principal-on-azure-cloud-428h
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Overcoming Terraform Deployment Challenges How to fix authorization issues using Service Principal on Azure CloudIn my opinion Terraform is one of the most powerful tools for automating resource deployment However even with the right permissions and configurations there will always be challenges that you will have to overcome The author describes her triumphant experience provisioning Azure resources with Terraform overcoming perplexing errors and roadblocks Before I go into details about the issues I faced and what worked here is a short overview of Terraform s use for provisioning Azure VMs you can view this detailed low level example at Install Terraform on your local PC by downloading the binary from the official Terraform website Create an Azure account if you haven t already done so and then create a service principal with contributor access You can use this service principal to authenticate Terraform with Azure Create a directory for your Terraform files and initialize it with the Azure provider You can do this by running terraform init in the directory and specifying the Azure provider Create a Terraform configuration file usually named main tf that defines the resources you want to provision For example you can define an Azure VM and an Azure Blob Storage resource Run terraform plan to preview the changes that Terraform will make to your Azure resources This step is optional but highly recommended as it can help you catch any potential issues before making any changes Run terraform apply to apply the changes to your Azure resources Terraform will prompt you to confirm the changes before proceeding Finally manage your Azure resources going forward you can use Terraform to update delete or add new resources Back to the main challenge My sole purpose was to provision Azure resources using Terraform Despite having a well configured service principal with the appropriate permissions Hmm My expectations of it going so smoothly came short Attempts to log in with both the service principal and Az Login methods only compounded the problem yielding errors that seemed to have a false positive so to speak In an attempt to resolve this issue I engaged Microsoft s support tweaking permissions and meticulously reviewing configurations but to no avail The breakthrough came unexpectedly when out of sheer determination I decided to switch to the root Azure account and opted for Az Login And just like that Terraform began to cooperate This unconventional approach revealed the complexity of interactions between Terraform Azure and authentication methods which provided the solution In addition to emphasizing the importance of adaptability and creativity in problem solving this experience also emphasizes that it is sometimes possible to reach the desired destination by taking an alternative path Well this is obviously not the best approach and practice I d adopt going forward but documenting this here may help someone tomorrow I believe success often comes when we approach obstacles with an open mind and a willingness to explore unconventional solutions |
2023-08-26 09:10:38 |
| 海外科学 |
NYT > Science |
In New York City, the Chances of Spotting a Rare Bird are on the Rise |
https://www.nytimes.com/2023/08/26/nyregion/new-york-city-climate-birds.html
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In New York City the Chances of Spotting a Rare Bird are on the RiseSharp eyed birders might spot brown boobies a tropical species once rare even in the Southern states A flock of Canada geese might just include a pink footed goose too |
2023-08-26 09:00:54 |
| ニュース |
BBC News - Home |
Spain FA accuses player Hermoso of lying about World Cup kiss |
https://www.bbc.co.uk/sport/football/66626410?at_medium=RSS&at_campaign=KARANGA
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rubiales |
2023-08-26 09:44:52 |
| ニュース |
BBC News - Home |
Loch Ness Monster: Hundreds join huge search for Nessie |
https://www.bbc.co.uk/news/uk-scotland-highlands-islands-66614935?at_medium=RSS&at_campaign=KARANGA
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nessie |
2023-08-26 09:43:25 |
| ニュース |
BBC News - Home |
Notting Hill Carnival 2023: The line-up and what you need to know |
https://www.bbc.co.uk/news/uk-england-london-66580333?at_medium=RSS&at_campaign=KARANGA
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carnival |
2023-08-26 09:42:42 |
| ニュース |
BBC News - Home |
England v New Zealand: Injured Josh Tongue replaced by Chris Jordan in hosts' squad |
https://www.bbc.co.uk/sport/cricket/66627281?at_medium=RSS&at_campaign=KARANGA
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England v New Zealand Injured Josh Tongue replaced by Chris Jordan in hosts x squadPace bowler Josh Tongue is ruled out of England s T series against New Zealand through injury with Chris Jordan replacing him |
2023-08-26 09:44:42 |
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