You can see the packages to pass, but you can not see its contents
IPSec Packet Types
IPSec packet types include the authentication header (AH) for data integrity and the encapsulating security payload (ESP) for data confidentiality and integrity.
The authentication header (AH) protocol creates an envelope that provides integrity, data origin identification and protection against replay attacks. It authenticates every packet as a defense against session-stealing attacks. Although the IP header itself is outside the AH header, AH also provides limited verification of it by not allowing changes to the IP header after packet creation (note that this usually precludes the use of AH in NAT environments, which modify packet headers at the point of NAT). AH packets use IP protocol 51.
The encapsulating security payload (ESP) protocol provides the features of AH (except for IP header authentication), plus encryption. It can also be used in a null encryption mode that provides the AH protection against replay attacks and other such attacks, without encryption or IP header authentication. This can allow for achieving some of the benefits of IPSec in a NAT environment that would not ordinarily work well with IPSec. ESP packets use IP protocol 50.
Tracing network traffic requires a network monitor, protocol analyzer, or packet sniffer.
a packet sniffer has unlimited troubleshooting tasks
Yes
Although unfamiliar with the term packet sniffer is has been discovered that it is a term related to technology. A packet sniffer is used by a system administrator or network to troubleshoot and monitor a network. It helps to maintain network data transmission.
SNMP
you must use sniffer-detecting tools to help stop the snoops. ...A good packet sniffer would be "ethereal"http://www.ethereal.com/
Packet sniffing is usually sniffs wireless transmissions. Sniffing is the interception of data or packets. The person who is suppose to receive the information still does but a third party has the ability to eavesdrop read the data. Packets can range from harmless info like your latest homework assignment or other more sensitive information like your Bank statement. The method to avoid a person sniffing your data sent wirelessly is to encrypt the data with modern day encryption algorithms.
packet sniffer
this is what is called a packet sniffer you can see what information is going in and out of the network
launch a denial of service (DoS) attack on your computer
EIGRP
you must use sniffer-detecting tools to help stop the snoops. ...A good packet sniffer would be "ethereal"http://www.ethereal.com/