Explain the following

Threats in networks Session hijacking TCP sessions TCP protocol sets up state at sender and receiver end nodes and uses this state while exchanging packets (using e.g. sequence numbers for detecting lost packets) Attacker can hijack such a session and masquerade as one of the endpoints Web servers sometimes have client store cookies to re-identify client for future visits Attacker can sniff or steal cookie and masquerade as client Replay attack Attacker captures data and resent it at a later time Threats in networks Session hijacking (Continued) Man-in-the-middle attacks are similar, attacker becomes stealth intermediate node, not end node. usually participates from the start of the session Traffic analysis Key Interception by a Man-in-the-Middle Attack