IPSec (IP Security)
... second set of shared secret keys Phase1-SA is used to setup IPSec SAs usually (at least)two unidirectional IPSec SAs Phase2 repeated to change keys, Phase1-SA remains ...
... second set of shared secret keys Phase1-SA is used to setup IPSec SAs usually (at least)two unidirectional IPSec SAs Phase2 repeated to change keys, Phase1-SA remains ...
Computer Networks and Internets
... Waits for network to form connection Leaves connection in place while sending data Terminates connection when no longer needed ...
... Waits for network to form connection Leaves connection in place while sending data Terminates connection when no longer needed ...
CogNet Quad Chart
... experience gathered in one place by one being to actions by another being elsewhere • Scalable autoconfiguration and network management • Dynamic network layer supporting tailored functionality – use IP, group messaging, rich queries, etc. as appropriate • Builds on and extends cognitive radios ...
... experience gathered in one place by one being to actions by another being elsewhere • Scalable autoconfiguration and network management • Dynamic network layer supporting tailored functionality – use IP, group messaging, rich queries, etc. as appropriate • Builds on and extends cognitive radios ...
Computer Networks
... 46. What is region? When hierarchical routing is used, the routers are divided into what we will call regions, with each router knowing all the details about how to route packets to destinations within its own region, but knowing nothing about the internal structure of other regions. 47. What is sil ...
... 46. What is region? When hierarchical routing is used, the routers are divided into what we will call regions, with each router knowing all the details about how to route packets to destinations within its own region, but knowing nothing about the internal structure of other regions. 47. What is sil ...
Evolution of PC_LANS and Networks
... Analogous to the postal service; package can take several possible routes to reach destination Network information is broken into packets Transmission resources are shared by many connections. More than one path to destination Each transmission unit must contain addressing information More efficient ...
... Analogous to the postal service; package can take several possible routes to reach destination Network information is broken into packets Transmission resources are shared by many connections. More than one path to destination Each transmission unit must contain addressing information More efficient ...
Application Note: Voice Over IP (VoIP)
... Audio Codec – most are standardized, watch for the proprietary Latency – distance is tough and the number of hops Jitter & Jitter buffer – different time and different order While there are mechanisms by which engineering can adjust and tune the interactions of VoIP and the infrastructure, the impac ...
... Audio Codec – most are standardized, watch for the proprietary Latency – distance is tough and the number of hops Jitter & Jitter buffer – different time and different order While there are mechanisms by which engineering can adjust and tune the interactions of VoIP and the infrastructure, the impac ...
Chapter 32
... – But we know that the TTL and checksum fields are changed each hop – Mutable fields are those IP headers that get changed in transit • We don’t want these slight changes to cause authentication errors • So IPsec will only authenticate the immutable fields ...
... – But we know that the TTL and checksum fields are changed each hop – Mutable fields are those IP headers that get changed in transit • We don’t want these slight changes to cause authentication errors • So IPsec will only authenticate the immutable fields ...
Security in VoIP - Florida Atlantic University
... Demilitarized Zone (DMZ) - Overcomes problem by placing a MCU ...
... Demilitarized Zone (DMZ) - Overcomes problem by placing a MCU ...
Network Security (Daliah Stephan).
... – It is firewall that operate at the Application Layer of the OSI – They filter packets at the network layer – It Operating between the Datalink Layer and the Network Layer – It monitor the communication type (TCP, UDP, ICMP, etc.) as well as the origination of the packet, destination port of the pa ...
... – It is firewall that operate at the Application Layer of the OSI – They filter packets at the network layer – It Operating between the Datalink Layer and the Network Layer – It monitor the communication type (TCP, UDP, ICMP, etc.) as well as the origination of the packet, destination port of the pa ...
William Stallings Data and Computer Communications
... support range of network services differentiated on basis of performance IP Packets labeled for differing QoS using existing IPv4 Type of Service or IPv6 Traffic calss Service level agreement established between provider and customer prior to use of DS Built in aggregation Good scaling to lar ...
... support range of network services differentiated on basis of performance IP Packets labeled for differing QoS using existing IPv4 Type of Service or IPv6 Traffic calss Service level agreement established between provider and customer prior to use of DS Built in aggregation Good scaling to lar ...
DCN-9-Communication-Services
... •Not used by any other network traffic at that point of time and hence, •Entire message follows the same path. ...
... •Not used by any other network traffic at that point of time and hence, •Entire message follows the same path. ...
The Internet and Security
... et. al. in 3 weeks found > 12,000 attacks against > 5000 targets belonging to > 2000 organizations. • a denial-of-service attack left whitehouse.gov unreachable from, according to a Web monitor, around 2:30 p.m. EDT to ...
... et. al. in 3 weeks found > 12,000 attacks against > 5000 targets belonging to > 2000 organizations. • a denial-of-service attack left whitehouse.gov unreachable from, according to a Web monitor, around 2:30 p.m. EDT to ...
P2P Protocols
... User request is forwarded to a nearest CDN node, which has a cached copy QoS improves, as end user receives best possible ...
... User request is forwarded to a nearest CDN node, which has a cached copy QoS improves, as end user receives best possible ...
No Slide Title
... ATM supports two types of connections: – Point-to-point, which connects two ATM end systems and can be unidirectional (one-way communication) or bidirectional (two-way communication). – Point-to-multipoint connects a single-source end system (known as the root node) to multiple destination end sys ...
... ATM supports two types of connections: – Point-to-point, which connects two ATM end systems and can be unidirectional (one-way communication) or bidirectional (two-way communication). – Point-to-multipoint connects a single-source end system (known as the root node) to multiple destination end sys ...
Distributed Monitoring of Mesh Networks
... RREQ, RREP, RERR, Hello received packet counters UDP payload and timestamp ...
... RREQ, RREP, RERR, Hello received packet counters UDP payload and timestamp ...
Assignment-3
... Some routers support VPN, which allow home users to safely log into their businesses remotely Routers monitor network usage, and can send email alarms when abnormal things happen Many routers have wireless capability with strong WPA encryption Router allows for sharing network peripherals su ...
... Some routers support VPN, which allow home users to safely log into their businesses remotely Routers monitor network usage, and can send email alarms when abnormal things happen Many routers have wireless capability with strong WPA encryption Router allows for sharing network peripherals su ...
Identity-Based Security
... access – any client that violates specific firewall rules even a single time. This is particularly useful when single-purpose devices such as voice over IP handsets are used. If the Aruba mobility controller detects a voice handset attempting to conduct database queries or file server browsing, it i ...
... access – any client that violates specific firewall rules even a single time. This is particularly useful when single-purpose devices such as voice over IP handsets are used. If the Aruba mobility controller detects a voice handset attempting to conduct database queries or file server browsing, it i ...
Communications Networks II: Design and Algorithms
... stochastic queueing analysis and simulation topics for EL735 ...
... stochastic queueing analysis and simulation topics for EL735 ...
CSC 335 Data Communications and Networking I
... pieces all arrive correctly at the other end. • The transport layer also determines the type of services, connection-oriented or connectionless. • Congestion control ...
... pieces all arrive correctly at the other end. • The transport layer also determines the type of services, connection-oriented or connectionless. • Congestion control ...
Networking and communication
... transport layer The OS adds a TCP header that identify the source and destination ports, forming a TCP segment, and sends that to the network layer In the network layer, an IP header identifying the source and destination systems are added, which gets sent to the link layer The link layer appe ...
... transport layer The OS adds a TCP header that identify the source and destination ports, forming a TCP segment, and sends that to the network layer In the network layer, an IP header identifying the source and destination systems are added, which gets sent to the link layer The link layer appe ...
computer networks
... Computer Networks vs. distributed systems • distributed system: collection of independent computers appears to its users as a single coherent system. • A well-known example of a distributed system is the ...
... Computer Networks vs. distributed systems • distributed system: collection of independent computers appears to its users as a single coherent system. • A well-known example of a distributed system is the ...
presentation source
... – peer-to-peer and guest, should not be allowed – shares require username and password ...
... – peer-to-peer and guest, should not be allowed – shares require username and password ...