802.11b - Basics ===================== .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is IEEE 802.11b?** IEEE 802.11b is a Wi-Fi standard introduced in 1999 that operates in the 2.4 GHz frequency band and supports data rates up to 11 Mbps. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What frequency band does 802.11b use?** 802.11b operates in the 2.4 GHz ISM (Industrial, Scientific, and Medical) band. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What maximum data rate does 802.11b support?** It supports a maximum data rate of 11 Mbps. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What modulation technique does 802.11b use?** 802.11b primarily uses Complementary Code Keying (CCK) modulation. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the typical range of 802.11b?** Indoor range is roughly 35 meters, and outdoor range can extend up to 140 meters. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is 802.11b backward compatible?** 802.11b is backward compatible with the earlier 802.11 standard (1 and 2 Mbps rates). .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Which OSI layer does 802.11b operate on?** It operates on the Physical (Layer 1) and Data Link Layer (Layer 2) of the OSI model. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the channel bandwidth of 802.11b?** It uses a channel bandwidth of 22 MHz. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **How many non-overlapping channels are available in 802.11b?** There are 3 non-overlapping channels (1, 6, and 11) in most countries. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is 802.11b susceptible to interference?** Yes, since it operates at 2.4 GHz, it is prone to interference from devices like microwaves, cordless phones, and Bluetooth devices. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is 802.11b still widely used today?** It is largely outdated but may still be found in legacy devices or low-speed applications. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What transport protocols does 802.11b support?** It supports all standard IP-based protocols such as TCP, UDP, and ICMP. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is 802.11b secure?** Originally, it used WEP encryption which is now considered insecure; modern networks use WPA/WPA2 even on legacy devices. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Can 802.11b coexist with 802.11g?** Yes, 802.11g devices can operate in mixed mode with 802.11b devices but performance may be reduced. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What is the latency like on 802.11b?** Latency is higher compared to modern Wi-Fi standards, making it less suitable for real-time applications. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **What physical media does 802.11b use?** It uses wireless radio waves in the 2.4 GHz band. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Which devices commonly used 802.11b?** Early Wi-Fi routers, laptops, and wireless peripherals from the early 2000s. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Does 802.11b support Quality of Service (QoS)?** QoS support was limited or absent in the original 802.11b standard. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow **Is 802.11b still part of the Wi-Fi Alliance certifications?** No, newer certifications focus on more recent standards, though backward compatibility is maintained. .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow Topics in this section, * :ref:`Learnings in this section <802_11b_step1>` * :ref:`Terminology <802_11b_step2>` * :ref:`Version Info <802_11b_step3>` * :ref:`802_11b Version&IEEE Details <802_11b_step4>` * :ref:`802_11b Basic Setup on Ubuntu using IPv4 <802_11b_step5>` * :ref:`802_11b Basic Setup on Ubuntu using IPv6 <802_11b_step6>` * :ref:`802_11b List of MAC features <802_11b_step7>` * :ref:`802_11b Medium Access Functions and their inner working <802_11b_step8>` * :ref:`802_11b Supported Frequency Bands in 802.11b <802_11b_step9>` * :ref:`802_11b List of Physical Features <802_11b_step10>` * :ref:`802_11b Power Saving Mechanisms in IEEE 802.11b <802_11b_step11>` * :ref:`802_11b Interoperability Mechanisms in IEEE 802.11b <802_11b_step12>` * :ref:`802_11b End-User Products that support 802.11b <802_11b_step13>` * :ref:`802_11b Protocol Packet Details <802_11b_step14>` * :ref:`802_11b Basic Features <802_11b_step15>` * :ref:`Reference links <802_11b_step16>` .. _802_11b_step1: .. tab-set:: .. tab-item:: Learnings in this section * In this section, you are going to learn .. _802_11b_step2: .. tab-set:: .. tab-item:: Terminology * Terminology .. _802_11b_step3: .. tab-set:: .. tab-item:: Version Info * Version Info .. _802_11b_step4: .. tab-set:: .. tab-item:: 802.11b Version&RFC Details * rfc details .. _802_11b_step5: .. tab-set:: .. tab-item:: 802.11b Basic Setup on Ubuntu using IPv4 * setup .. _802_11b_step6: .. tab-set:: .. tab-item:: 802.11b Basic Setup on Ubuntu using IPv6 * setup .. _802_11b_step7: .. tab-set:: .. tab-item:: 802.11b List of MAC features * mac features .. _802_11b_step8: .. tab-set:: .. tab-item:: 802.11b Medium Access Functions and their inner working * Medium Access Functions and their inner working .. _802_11b_step9: .. tab-set:: .. tab-item:: Supported Frequency Bands in 802.11b * Supported Frequency Bands in 802.11b .. _802_11b_step10: .. tab-set:: .. tab-item:: 802.11b List of Physical Features * List of Physical Features .. _802_11b_step11: .. tab-set:: .. tab-item:: Power Saving Mechanisms in IEEE 802.11b * Power Saving Mechanisms in IEEE 802.11b .. _802_11b_step12: .. tab-set:: .. tab-item:: Interoperability Mechanisms in IEEE 802.11b * Interoperability Mechanisms in IEEE 802.11b .. _802_11b_step13: .. tab-set:: .. tab-item:: End-User Products that support 802.11b * End-User Products that support 802.11b .. _802_11b_step14: .. tab-set:: .. tab-item:: Protocol Packet Details in 802.11b * Protocol Packet Details .. _802_11b_step15: .. tab-set:: .. tab-item:: Basic Features * Basic Features .. _802_11b_step16: .. tab-set:: .. tab-item:: Reference links * Reference links