Differences

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--- network [2019/05/21 14:41] – theguru
+++ network [2020/12/25 23:08] (current) – external edit 127.0.0.1
@@ Line 45: / Line 45: @@
 bia - burned in address
+Layer 2 - Broadcast Domains
+switch = transparent bridging
+Broadcast - all switches are one broadcast domain by default
+Broadcast - can not transverse a router
+Collision domains -
+----
+**Encapsulation** = layer header + data
+- Transport Layer chunk of data = Segment -
+- Network Layer - chunk of data - packet
+- Data Link Layer - chunk of data - frame
+- Ethernet - MAC address
+- Physical Layer
+**Data Networks and Addressing**
+Addressing at the Data Link Layer - frame
+media access control - 48 bit hexadecimal number local address MAC -
+st 24 bits = manufacturer ID
+ne 24 bits = serial number
+Packet Internet or Inter-Network Groper (PING) used to test the reachability of a host on an Internet Protocol (IP) network.
+**Cisco Certifications**
+  * Entry Level - CCENT - Entry Network Technician
+  * Associate - CCNA - Network Associate - most common - Route/Switch
+  * Professional - CCNP - Network Professional
+  * Expert - CCIE - Internetworking Expert

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