During a network troubleshooting session, a network technician isolates an issue to the Data Link Layer (Layer 2) of the OSI reference model while examining Ethernet traffic on a managed switch port. Which of the following functions or operations are performed specifically at Layer 2 of the OSI model? (Select TWO.)
- Encapsulating network-layer packets into frames containing physical source and destination MAC addressesCevap
- Performing bit-level error detection across the physical media using a Frame Check Sequence (FCS) trailerCevap
- CProviding end-to-end reliability and flow control using sequence numbers and sliding window mechanisms
- DEvaluating logical IP network addresses to select optimal paths across interconnected subnets
Cevap
The functions performed at Layer 2 (Data Link Layer) are encapsulating packets into frames with physical MAC addresses and detecting errors using a Frame Check Sequence (FCS) trailer.
The Data Link Layer (Layer 2) formats network data into frames using physical MAC addresses for node-to-node delivery on a local network segment and appends a Frame Check Sequence (FCS) to detect frame corruption.
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OSI Data Link Layer (Layer 2) Functions and PDUs