number: 48).
Family: Network Service
Over: ip
Revision: 19
Risk level: 1
Tag: Not Used
18.42. Datagram Transport Layer Security
DTLS stands for Datagram Transport Layer Security protocol. It provides communications privacy
for datagram protocols, and prevents eavesdropping, tampering, or message forgery.
Family: Network Service
Over: udp
Revision: 13
Risk level: 5
Tag: Tunnels
Tag: Masquerading Tunnels
18.43. Dynamic Trunking Protocol
DTP (Dynamic Trunk Protocol) is a proprietary networking protocol developed by Cisco Systems
for the purpose of negociating trunking on a link between two VLAN-aware switches.
Family: Network Service
Over: 8021q
Over: eth
Over: gre
Over: snap
Revision: 17
Risk level: 1
Tag: Not Used
18.44. Echo
The echo service simply sends back to the originating source any data it receives.
Family: Network Service
Over: tcp
Over: udp
Revision: 18
Risk level: 1
Tag: Information Leaking
18.45. Exterior Gateway Protocol
The egp protocol (Exterior Gateway Protocol) is found over the IP layer (IANA protocol number:
8).
Family: Network Service
Chapter 18: Network Service
204
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