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P packet Flooding Attack Network Bandwidth Denial of Service (DoS) Packet-Dropping AttackBog'liq gu2011 AQLLI SHAHAR, TEST, 1-мактаб тўгарак жадвал, BUYRUQ. YASIN BREND, TAQRIZ YANGI, 2, Tarjima SPLINES, DIFFERENTIAL EQUATIONS, AND OPTIMAL, (11-ozbetinshe K.U.A)Q.Zafar, APPLIKATSIYADA QIRQISHNI HAR HIL USULLARINI BAJARISH, EDUCATION SYSTEM OF UZBEKISTON, O’zbekistonning va jahon hamjamiyati, OCHILOVA NIGORANING, 7 yosh inqirozi uning sabablari va alomatlari, TEXNIKA MADANIYATI, AAAExperimental Results
Packet-dropping attacks affect a network in several aspects.
The direct attack consequence is the reduction of traf-
fic throughput. Unlike other packet-dropping attacks, the
periodic packet-dropping attack can reduce the through-
put of a TCP connection to zero with some specific
dropping periods. In [
], such an attack was studied in ad
hoc networks. An attacking node gets in the path of a vic-
tim traffic flow and drops all packets for a short duration
(e.g., tens of milliseconds) once per RTO. Upon encoun-
tering the first loss duration, the victim flow will enter
time-out. When the flow attempts to exit the timeout RTO
seconds later, the attacking node will drop again to make
the flow stay in the timeout status.
Figure a
depicts the simulation results with the peri-
odic packet-dropping attack. In the simulation, a sin-
gle attacking node is put in multiple hop paths. A time
period of indicates no attack. For example, the flow of
a -hop path obtains a throughput of Kbps without
attack, while the flow of a -hop path has a throughput of
Kbps. The attacking node drops packets for ms with
various dropping periods. When the dropping periods are
between . and . s or s, the throughput is reduced to .
If the dropping period is s, the attacking node only drops
% of the time, but forwards % of the time, which makes
the packet-dropping attack quite stealthy.
The other major effect of packet-dropping attacks is
the augmented delay due to retransmission of dropped
packets. In [
], periodic packet dropping, retransmission
packet dropping and random packet dropping attacks
were compared in a file transfer protocol (FTP) appli-
cation. An attacking agent was executed to drop trans-
ferred data packets according to the dropping patterns.
Figure b
shows the augmented delay in FTP sessions with
different numbers of dropped packets. In the three packet-
dropping attacks, retransmission packet dropping causes
significantly more damage than the other two. The FTP ses-
sion delay corresponding to the retransmission dropping
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