Answer:
return string[0]+string [-1]
Explanation:
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Answer:
ARPANET
Explanation:
ARPANET was created in 1969 to connect scientific and research users across multiple institutions for collaboration. It was not intended to carry commercial traffic. However as the network evolved it metamorphosed into a massively large global network based on TCP/IP which we now know as the Internet or world wide web(WWW). The internet now carries all kinds of traffic including commercial traffic.
Answer:
The Datalink layer encapsulates each packet in a frame which contains the hardware address (MAC) of the source and destination computer (host) and the LLC information which identifies to which protocol in the prevoius layer (Network layer) the packet should be passed when it arrives to its destination.
Explanation:
Answer:
SaaS, Software as a Service.
Explanation:
SaaS gives the user cloud access to their applications. For instance in this case, MS Office Suite, Exchange Server, Lync SErver and SharePoint Server. These applications run on the cloud, meaning the process on remote servers provided by the subscription. These servers take input from the user, and process the input in a remote location and ten give back the logical output.
Attackers frequently use ACK scans to circumvent a firewall or other filtering tools. During a NULL scan, all packet flags are enabled. The most recent versions of Nessus Server and Client are compatible with Windows, Mac OS X, FreeBSD, and the vast majority of Linux variants.
<h3>What is ack scan ?</h3>
- ACK scans are used to identify hosts or ports that have been blocked or are resistant to other types of scanning. An attacker uses TCP ACK segments to learn about firewall or ACL configuration.
- Attackers probe our router or send unsolicited SYN, ACK, and FIN requests to specific UDP/TCP ports.
- TCP ACK Scan sends an ACK message to the target port to determine whether or not it is filtered.
- On unfiltered ports, a RST reply packet will be sent for both open and closed ports. Filtered ports will either generate no response or generate an ICMP reply packet with an unreachable destination.
- The TCP ACK scanning technique attempts to determine whether a port is filtered by using packets with the ACK flag set.
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