updates

Signed-off-by: (Bit-Mage) <[email protected]>

Content/20231227162344-computer_networks.org

@@ -5,7 +5,7 @@
 #+filetags: :cs:programming:
 
 * Abstract
-The notion of communication between Computers. Theoretically captured by the [[https://en.wikipedia.org/wiki/OSI_model][7-layered OSI (open systems Interconnection)]] model.
+The notion of communication between Computers. Theoretically captured by [[id:2deb95d6-5474-4096-85fc-bd568031cc33][the OSI model]]
 
 The OSI Layers:
  1. Hardware

Content/20240215121050-kubernetes.org

@@ -8,6 +8,18 @@
 see [[id:f822f8f6-89eb-4aa8-ac8f-fdcff3f06fb9][Orchestration]]
 
 * Stream
+** 0x22E2
+- reading https://sookocheff.com/post/kubernetes/understanding-kubernetes-networking-model/
+** 0x22E1
+ - the <git vc host>/kubernetes/hack/ is useful
+ - charting the kubernetes source code
+** 0x22DF
+*** Netshoot
+ - for debugging purposes:
+   - definitely checkout netshoot
+   - recommend using as a plugin with krew
+   - am locally using on my minikube dev setup via krew as of now
+   - https://github.com/nicolaka/netshoot
 ** 0x22D6
 *** Open Container Initiative
 - https://opencontainers.org/
@@ -17,7 +29,7 @@ see [[id:f822f8f6-89eb-4aa8-ac8f-fdcff3f06fb9][Orchestration]]
 - https://kubernetes.io/docs/concepts/architecture/cri/
 **** Container Network Interface
 **** Container Storage Interface
-** 0x22D6
+** 0x22D5
  - some quick indexes from container.training
  - internal dynamic dns:  https://qconuk2019.container.training/#46
  - how the master node avoids running workloads: https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/

Content/20240305152640-web_application_firewall.org

@@ -1,7 +1,7 @@
 :PROPERTIES:
 :ID:       49fee858-eb36-4230-8eb0-881df964aec8
 :END:
-#+title: Web Application Firewall
+#+title: Firewall
 #+filetags: :sec:web:
 
 An agent between requests from the web and a server that acts as a to avoid exploits.

Content/20240501185858-load_balancing.org

@@ -2,7 +2,7 @@
 :ID:       0d7c2dea-a250-4380-b826-ad4d2547d8d6
 :END:
 #+title: Load Balancing
-#+filetags: :web:
+#+filetags: :network:web:
 
 * Abstract
  - Revolves around the idea of balancing requests over a pool of resources to avoid the over-"load"ing of any single point of service.

Content/20240502085158-linux.org

@@ -2,7 +2,7 @@
 :ID:       d43f2ef3-6eb4-4f8d-89ed-095fedd7d7f9
 :END:
 #+title: Linux
-#+filetags: :cs:
+#+filetags: :linux:cs:
 
 * Abstract
  - this a fairly vast umbrella node that helps pedagogically cover several concepts in computer science.

Content/20240810072451-quectel_wwan.org

@@ -1,7 +1,17 @@
 :PROPERTIES:
 :ID:       051ff645-bf0b-4229-add9-56da0caa5654
 :END:
-#+title: quectel-wwan
+#+title: quectel EM05G
 #+filetags: :hardware:
 
-facing some issues with the EM05G post-suspension wake, tried some recommendations cause nmtui shows hardware missing
+* [[id:f9002f5f-f8b8-4064-8af4-dabcc145668d][Modem Manager]]
+
+* FCC Unlocking
+- https://mobile-broadband.pages.freedesktop.org/docs/modemmanager/fcc-unlock/
+- the module isn't detectable readily on boots (on a couple of linuces so far: Fedora 40, OpenSuse TW (2024+))
+- for Fedora 40, see https://foundata.com/en/blog/2024/quectel-em05-g-thinkpad-t14-gen4-fedora-linux/
+
+
+
+* Resources
+ - https://www.quectel.com/product/lte-em05-series/

Content/20241012070314-modemmanager.org

@@ -0,0 +1,8 @@
+:PROPERTIES:
+:ID:       f9002f5f-f8b8-4064-8af4-dabcc145668d
+:END:
+#+title: ModemManager
+#+filetags: :hardware:
+
+* Resources
+- https://mobile-broadband.pages.freedesktop.org/

Content/20241013061220-internet_protocol_address.org

@@ -0,0 +1,39 @@
+:PROPERTIES:
+:ID:       d799bc90-5032-4a69-9806-83145297a335
+:END:
+#+title: IP (Internet Protocol) Address
+#+filetags: :network:
+
+* Definition
+  - a unique numeric label assigned to each device connected to a [[id:a4e712e1-a233-4173-91fa-4e145bd68769][computer network]] that uses the IP for communication.
+  - two primary functions:
+    - identifying a host or network interface
+    - providing the location of the host in the network [[id:6bb5e976-0619-4a6e-8c6b-adb39d5dcc8c][topology]]
+
+* Types of IP Addresses
+** [[id:f3fda9d4-bfde-4672-8b51-a41700c0cd98][IPv4]]
+    - Consists of 32 bits.
+    - Forms over 4.3 billion unique addresses.
+    - Format: four octets separated by dots (e.g., 192.168.1.1).
+** [[id:1a3d2a4c-bfad-4e5a-ab97-4db4531e7bd2][IPv6]]
+    - Developed due to the exhaustion of IPv4 addresses.
+    - Consists of 128 bits.
+    - Can support about 340 undecillion addresses.
+    - Format: eight groups of four hexadecimal digits separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334).
+
+** [[id:1c4b02bf-2597-4e2d-9e85-1be4993dcb31][IPv5 Lore]]
+* Static vs. Dynamic IP Addresses
+  - Static IP Addresses
+    - Permanently assigned to a computer by an ISP.
+  - Dynamic IP Addresses
+    - Temporarily assigned from a pool by the [[id:dd743d7a-7e96-45a7-9894-13f79b351681][DHCP (Dynamic Host Configuration Protocol)]].
+
+* IP-related Concepts and Connections
+** [[id:c1875db1-be4d-43fe-9c88-bf5fc7a95df3][DNS (Domain Name System)]]
+    - Translates human-readable domain names to IP addresses.
+** [[id:e6f902bf-c138-4d79-85cc-98f1165ef761][IP Subnetting]]
+    - Divides a large network into smaller, manageable segments.
+** [[id:2db5d39c-8f0d-4bcb-ba73-c5d4e22c4d03][NAT (Network Address Translation)]]
+    - Allows multiple devices on a local network to share a single public IP address.
+
+** [[id:74055437-5557-4a21-9b7a-a3b5df3a8a24][IPVS (IP Virtual Server)]]

Content/20241013061617-ipv5_lore.org

@@ -0,0 +1,57 @@
+:PROPERTIES:
+:ID:       1c4b02bf-2597-4e2d-9e85-1be4993dcb31
+:END:
+#+title: IPv5 Lore
+#+filetags: :network:
+
+* Overview
+
+- IPv5, officially known as the Internet Stream Protocol (ST)
+  - Developed in the late 1970s and early 1980s as an experimental protocol.
+  - Intended to support voice and video streaming.
+
+- Historical Context
+  - Appeared after [[id:f3fda9d4-bfde-4672-8b51-a41700c0cd98][IPv4]], around the time networking demands started to exceed existing capabilities.
+  - Primarily focused on addressing multicast traffic requirements.
+
+- Reasons for Lack of Adoption
+  - [[id:1a3d2a4c-bfad-4e5a-ab97-4db4531e7bd2][IPv6]] development eventually overshadowed IPv5 due to its more comprehensive improvements.
+  - The Stream Protocol was not intended to replace IPv4 but to work alongside it for specific use cases.
+  - Limited deployment and lack of backward compatibility.
+
+- Connections
+  - IPv5 influenced future transport and streaming protocols by highlighting the need for real-time data transmission capabilities.
+  - Lessons from IPv5 partially informed design choices in subsequent protocols like RTP (Real-time Transport Protocol).
+
+- Critique
+  - IPv5's role as a standalone protocol was limited; thus, its practical applications were marginal.
+  - The protocol's compartmentalized vision indicates a lack of foresight for overarching internet scalability needs, something IPv6 addressed more robustly.
+
+- Connections and Historical Context
+  - The invention of IPv5 revealed early intentions to handle real-time communications, which laid groundwork concepts for later technologies.
+  - Key ideas from IPv5 can be seen in the development of [[id:11c09e36-bdef-4977-9142-6d8ec0e697ba][Quality of Service]] (QoS) mechanisms to prioritize data packages effectively.
+  - There is a progression of protocol evolution, from IPv4 addressing limitations, to IPv5 experimentation, culminating in IPv6, which provides a vastly larger address space and enhanced functionalities.
+
+- Critique
+  - IPv5 was limited by its integer-based versioning, as the number "5" was an interim step rather than a full-fledged protocol version; this highlights the complexity of protocol version transitions.
+  - The major critique of IPv5 was a lack of foresight concerning the explosion of internet-connected devices, which IPv6 primarily aimed to address with its larger address pool.
+
+- Ideation Strategies
+  - Understanding the failures and limitations of previous technologies like IPv5 can guide innovative thinking in protocol development and network infrastructure improvements.
+  - Encourage critical analysis of current network demands and potential future trends to preemptively design adaptable protocol systems.
+  - Foster interdisciplinary collaboration, as real-time data implications span fields like telecommunications, multimedia services, and IoT development.
+
+- Questions for Further Exploration
+  - What specific elements from IPv5 were integrated into later protocols?
+  - How has real-time data transmission evolved from early attempts like IPv5 to modern broadband technologies?
+  - Can the limitations of IPv5 provide insights into potential pitfalls for future network protocol developments?
+
+
+- It seems there was no specific context provided in the previous interaction.
+- To assist effectively, here are some questions to help guide the discussion:
+  - What domain or topic are you interested in exploring?
+  - Are you looking to understand a specific concept or historical development in network protocols?
+  - Is there a particular challenge or problem you are aiming to solve with the information?
+- Filling in these details will allow for more precise and helpful insights.
+* Resources
+- https://en.wikipedia.org/wiki/Internet_Stream_Protocol

Content/20241013061841-ipv6.org

@@ -0,0 +1,7 @@
+:PROPERTIES:
+:ID:       1a3d2a4c-bfad-4e5a-ab97-4db4531e7bd2
+:END:
+#+title: IPv6
+#+filetags: :network:
+
+see [[id:d799bc90-5032-4a69-9806-83145297a335][Internet Protocol Address]]

Content/20241013061908-ipv4.org

@@ -0,0 +1,7 @@
+:PROPERTIES:
+:ID:       f3fda9d4-bfde-4672-8b51-a41700c0cd98
+:END:
+#+title: IPv4
+#+filetags: :network:
+
+see [[id:d799bc90-5032-4a69-9806-83145297a335][Internet Protocol Address]]

Content/20241013062206-quality_of_service.org

@@ -0,0 +1,30 @@
+:PROPERTIES:
+:ID:       11c09e36-bdef-4977-9142-6d8ec0e697ba
+:END:
+#+title: Quality of Service
+#+filetags: :cs:network:
+
+* Definitions
+- Quality of Service (QoS) refers to the overall performance of a network or internet service, particularly the ability to guarantee a certain level of bandwidth, latency, and error rates.
+* Components
+- [[id:8d65e292-30f3-41c3-9611-d4a9acc173fb][Bandwidth]]: The maximum rate of data transfer across a network.
+- [[id:aa3f4461-08f4-4a3d-ae4b-5704d1f3dd23][Latency]]: The delay before a transfer of data begins following an instruction for its transfer.
+- [[id:e1ccd5f4-2431-457d-b823-334e767a29b3][Jitter]]: The variation in the time between packets arriving.
+- [[id:91792611-56f9-472c-acf1-c8402bda2de6][Error Rates]]: The frequency of errors in data transmission or processing.
+* Importance
+- Ensures reliable and predictable communication performance.
+- Crucial for applications requiring high data integrity and low latency, such as video conferencing and online gaming.
+- Connections
+- High QoS is generally correlated with enhanced user experience in digital services.
+- Implementation of QoS requires careful network planning and sometimes additional resources or infrastructure.
+- Critiques & Considerations
+- Measuring true QoS can be challenging due to variability in internet traffic and external factors.
+- Implementation may introduce complexity and overhead, potentially affecting performance in systems with constrained resources.
+- Improvement Strategies
+- Prioritize network traffic based on application needs.
+- Constant monitoring and adaptive algorithms to dynamically manage resources.
+- Investing in infrastructure upgrades to support higher performance standards.
+- Engaging in load balancing to distribute traffic effectively.
+- Areas for Further Inquiry
+- What are the best practices for implementing QoS in a large-scale network?
+- How can QoS be effectively measured and monitored in real-time?

Content/20241013062322-bandwidth.org

@@ -0,0 +1,5 @@
+:PROPERTIES:
+:ID:       8d65e292-30f3-41c3-9611-d4a9acc173fb
+:END:
+#+title: Bandwidth
+#+filetags: :cs:network:

Content/20241013062359-latency.org

@@ -0,0 +1,5 @@
+:PROPERTIES:
+:ID:       aa3f4461-08f4-4a3d-ae4b-5704d1f3dd23
+:END:
+#+title: Latency
+#+filetags: :network:cs:

Content/20241013062413-jitter.org

@@ -0,0 +1,5 @@
+:PROPERTIES:
+:ID:       e1ccd5f4-2431-457d-b823-334e767a29b3
+:END:
+#+title: Jitter
+#+filetags: :cs:network:

Content/20241013062429-error_rates.org

@@ -0,0 +1,5 @@
+:PROPERTIES:
+:ID:       91792611-56f9-472c-acf1-c8402bda2de6
+:END:
+#+title: Error Rates
+#+filetags: :network:cs:

Content/20241013062614-dhcp_dynamic_host_configuration_protocol.org

@@ -0,0 +1,5 @@
+:PROPERTIES:
+:ID:       dd743d7a-7e96-45a7-9894-13f79b351681
+:END:
+#+title: DHCP (Dynamic Host Configuration Protocol)
+#+filetags: :cs:network:

Content/20241013062649-dns_domain_name_system.org

@@ -0,0 +1,5 @@
+:PROPERTIES:
+:ID:       c1875db1-be4d-43fe-9c88-bf5fc7a95df3
+:END:
+#+title: DNS (Domain Name System)
+#+filetags: :network:cs:

Content/20241013062709-nat_network_address_translation.org

@@ -0,0 +1,5 @@
+:PROPERTIES:
+:ID:       2db5d39c-8f0d-4bcb-ba73-c5d4e22c4d03
+:END:
+#+title: NAT (Network Address Translation)
+#+filetags: :cs:network:

Content/20241013062853-ip_subnetting.org

@@ -0,0 +1,5 @@
+:PROPERTIES:
+:ID:       e6f902bf-c138-4d79-85cc-98f1165ef761
+:END:
+#+title: IP Subnetting
+#+filetags: :network:cs:

Content/20241013062954-ipvs_ip_virtual_server.org

@@ -0,0 +1,22 @@
+:PROPERTIES:
+:ID:       74055437-5557-4a21-9b7a-a3b5df3a8a24
+:END:
+#+title: IPVS (IP Virtual Server)
+#+filetags: :cs:network:
+
+* Overview
+  - *Definition*: IPVS ([[id:d799bc90-5032-4a69-9806-83145297a335][IP]] Virtual Server) is a transport-layer [[id:0d7c2dea-a250-4380-b826-ad4d2547d8d6][load balancing]] tool implemented within the [[id:d43f2ef3-6eb4-4f8d-89ed-095fedd7d7f9][Linux]] Kernel.
+    - It is part of the [[id:b8797396-4551-4a54-84ea-80b8f1a5b086][LVS (Linux Virtual Server)]]  project.
+    - Operates at Layer 4 of the [[id:2deb95d6-5474-4096-85fc-bd568031cc33][OSI model]] (Transport Layer).
+
+  - *Purpose*: Distributes network traffic across multiple servers.
+    - Used for scaling services by spreading client requests.
+    - Ensures high availability and reliability of applications.
+
+  - *Use Cases*:
+    - Commonly used for load balancing web servers.
+    - Supports both TCP and UDP protocols.
+
+  - *Implementation*:
+    - Kernel module: Requires appropriate configuration of kernel and network settings.
+    - Works in conjunction with iptables for packet filtering.

Content/20241013063203-lvs_linux_virtual_server.org

@@ -0,0 +1,5 @@
+:PROPERTIES:
+:ID:       b8797396-4551-4a54-84ea-80b8f1a5b086
+:END:
+#+title: LVS (Linux Virtual Server)
+#+filetags: :linux:

Content/20241013063317-the_osi_model.org

@@ -0,0 +1,5 @@
+:PROPERTIES:
+:ID:       2deb95d6-5474-4096-85fc-bd568031cc33
+:END:
+#+title: OSI (Open Systems Interconnection) Model
+#+filetags: :network:cs:

Content/20241013071303-conntrack.org

@@ -0,0 +1,29 @@
+:PROPERTIES:
+:ID:       a5c1f909-fffb-4afb-af50-5c546820dd7c
+:END:
+#+title: conntrack
+#+filetags: :network:cs:
+
+* Overview
+** Definition
+- conntrack is a system used for [[id:a4e712e1-a233-4173-91fa-4e145bd68769][network connection]] tracking.
+- Integral to many firewall software setups, especially in Linux-based systems.
+
+** Functionality
+- Monitors state of active connections.
+- Manages connection state information for network protocols such as TCP, UDP.
+- Utilizes a state table for tracking connections.
+
+** Importance
+- Enhances security by helping to filter and manage network traffic.
+- Allows for more complex and dynamic firewall rules.
+- Important for network performance tuning and understanding traffic patterns.
+
+** Key Components
+- conntrack-tools: a suite of user-space utilities to manage the active connections.
+- nf_conntrack: a kernel module handling the connection tracking functionality.
+
+** Connection to [[id:49fee858-eb36-4230-8eb0-881df964aec8][Firewalls]]
+- Used extensively in iptables/netfilter frameworks.
+- Provides stateful inspection capabilities, allowing decisions based on connection states.
+