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Network Basics Companion Guide by Cisco Networking Academy

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Glossary

Numbers

802.11 Wireless A series of specifications developed by IEEE for implementing wireless local area network (WLAN) computer communication.

A

Access attacks A phrase used to describe an attack on a computer network that is designed to allow unauthorized access to computer resources.

ACK A 1-bit flag in the TCP header that indicates the acknowledgement field is valid.

acknowledgement A notification sent from one network device to another to confirm that some event (for example, receipt of a message) has occurred.

acknowledgement number A 32-bit field in the TCP segment header that specifies the sequence number of the next byte this host expects to receive as a part of the TCP session. It is used to recognize lost packets and ...

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