Protocols at roughly OSI Layers 2 through 4 are in the business of finding network internal paths, ... Table 1: Data Link Failures at a High Level. Scope : Failure Mode: Countermeasures: ...

OK, hands up, who knows what High-Level Data Link Control (HDLC) is? It's an archaic networking data framing protocol that's used in modems, X.25, frame-relay, ISDN, and other now uncommon ...

The ISDN B channels will typically utilize a point-to-point protocol such as HDLC (High-Level Data Link Control) or PPP frames at Layer 2. However, you can sometimes see other encapsulation, such ...

CRC (cyclic-redundancy checking) allows you to verify the integrity of transmitted data frames. It finds use in many transmission protocols, both bit-oriented (High Level Data Link Control, Advanced ...