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ccna 200-301 dump free.encapsulated between the Ethernet header and the end of the packet.Encoding The specification of how a device transforms the optical or electrical signals transmitted over a cable into a particular binary code. For example, a modem can encode into binary 1 or 0 by using one frequency for 1 and another frequency for 0.Encryption is the ability to save or send data in a form that cannot be read even if it is intercepted.EtherChannel A Cisco proprietary feature that refers to up to eight parallel Ethernet segments between two identical devices, each segment using the same rate, that can be combined to form a network.using the same rate, which can be combined into a single link for forwarding and spanning-tree protocol logic.Ethernet WAN (EthernetWAN) refers to any kind of WAN service that happens to use any kind of Ethernet link as the access link between the user and the WAN service.EUI-64 is strictly speaking an extended unique identifier (64 bits long). In particular, for IPv6, a set of rules is used to create a 64-bit long identifier as the interface ID in an IPv6 address - first the 48-bit MAC address, inserting FFFE (hex) in the middle, and then inverting the 7th bit.Q (Extended Access List) A list of IOS ac extended ce spread ss-access-list full-list local assignment commands that match multiple parts of an IP packet, including the source IP address, destination IP address, and TCP/UDP port. This can be used to determine which packets can be dropped and which packets can be allowed through the router.Extended ping An IOS command that accepts a number of options in addition to the destination IP address.Exterior Gateway Protocol (EGP) A routing protocol designed to exchange routing information between different autonomous systems.