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2.3 Describe the Data Link Layer (2.3.1. Explain the purpose and functions…
2.3 Describe the Data Link Layer
2.3.1. Explain the purpose and functions of the Data Link Layer
Allowing the upper layers to
access the media
Accepting Layer 3 packets and
packaging them into frames
Preparing network data for the
physical network
Controlling how data is placed
and received on the media
2.3.2 Describe the frame structure of Data Link layer
2.3.3 Identify the Data Link layer standards
IEEE
• 802.2: Logical Link Control (LLC)
• 802.3: Ethernet
• 802.4: Token bus
• 802.5: Token passing
• 802.11: Wireless LAN (WLAN) & Mesh (Wi-Fi certification)
• 802.15: Bluetooth
• 802.16: WiMax
ITU-T
• G.992: ADSL
• G.8100 - G.8199: MPLS over Transport aspects
• Q.921: ISDN
• Q.922: Frame Relay
ISO
• HDLC (High Level Data Link Control)
• ISO 9314: FDDI Media Access Control (MAC)
ANSI
• X3T9.5 and X3T12: Fiber Distributed Data Interface (FDDI)