Today I Learned
  • Today I Learned
  • Database
    • Intro to Database Systems
      • Advanced SQL
      • Database Storage
        • Disk oriented Architecture
        • Storage Hierarchy
        • Disk-oriented DBMS
        • Why not use the OS?
        • Storage manager
        • Database Pages
        • Record IDs
        • Tuple layout
      • Database storage II
        • Log-structured file organization
        • Tuple storage
        • Postgres: numeric
        • Large value
        • External value storage
        • System catalogs
        • Observation
        • OLTP
        • OLAP
        • N-ARY STORAGE MODEL (NSM)
        • Decomposition storage model (DSM)
        • Tuple Identification
      • Buffer Pool & Memory management
        • Buffer pool organization
        • Buffer pool meta-data
        • Page Table vs. Page Directory
        • Allocation Polocies
        • Buffer Pool Optimizations
          • Multiple Buffer Pools
          • Pre-Fetching
          • Scan Sharing
        • Buffer Pool Bypass
        • OS Page Cache
        • Buffer Replacement Policies
        • Least-Recently Used
        • Clock
        • Problems
        • Better Policies: LRU-K
        • Better Policies: Localization
        • Better Policies: Priority Hints
        • Dirty Pages
        • Background Writing
      • Hash Table
        • Hash tables
          • Chain hashing
          • Extendible hashing
          • Linear hashing
      • Tree indexes I
        • Table indexes
        • B+ Tree
          • Properties
          • Nodes
        • B-Tree vs. B+Tree
        • Cluster indexes
        • Selection conditions
        • Node size
        • Merge threshold
        • Non-Unique indexes
        • Intra-node search
        • Prefix compression
        • Suffix truncation
        • Bulk insert
        • Pointer swizziling
      • Tree Indexes II
        • B+Tree: Duplicate Keys
        • Implicit Indexes
        • Partial Indexes
        • Covering Indexes
        • Index Include Columns
        • Functional/Expression Indexes
        • Observation
        • Trie Index
          • Trie Index Properties
          • Trie key span
          • Radix Tree
          • Observation
        • Inverted Index
        • Query Types
        • Design decisions
      • Multi-Threaded Index Concurrency Control
        • Locks vs. Latches
        • Latch modes
        • Latch implementations
        • Hash table latching
        • B+ Tree concurrency control
        • Latch crabbing/coupling
        • Leaf node scans
        • Page 5
      • Sorting & Aggregations
        • External Merge Sort
          • 2-Way External Merge Sort
        • Using B+ Trees For Sorting
          • Case #1 - Clustered B+ Tree
          • Case #2 - Unclustered B+ Tree
        • Aggragations
          • Sorting aggregation
          • Alternatives to sorting
          • Hashing aggregate
  • Back-end
    • Docker
      • Basic cmd
    • Network
      • The internet
        • Protocol Stacks and Packets
        • Networking Infrastructure
        • Internet Infrastructure
        • The Internet Routing Hierarchy
        • Application Protocols: HTTP and the World Wide Web
        • Transmission Control Protocol
        • Internet Protocol
    • Programming Languages
      • Compiled vs Interpreted
  • Personal
    • Reflections on the Tiny Things I Learned in
      • 2023
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Internet Protocol

PreviousTransmission Control ProtocolNextProgramming Languages

Last updated 2 years ago

Unlike TCP, IP is an unreliable, connectionless protocol.

IP's job is too send and route packets to other computers.

IP packets are independent entities and may arrive out of order or not at all. It is TCP's job to make sure packets arrive and are in the correct order.

The application layer data is segmented in the TCP layer, the TCP header is added, the packet continues to the IP layer, the IP header is added, and then the packet is transmitted across the Internet.