MIS 5211.001 Week 2 Site:
... http://www.welivesecurity.com/2014/06/21/internet-firmddos-extortion-attack/ http://www.zdnet.com/article/apple-ios-flaw-ins0mniahides-malicious-apps-which-run-forever/ http://www.homelandsecuritynewswire.com/dr20150814new-analysis-method-discovers-eleven-security-flaws-inpopular-internet-browsers h ...
... http://www.welivesecurity.com/2014/06/21/internet-firmddos-extortion-attack/ http://www.zdnet.com/article/apple-ios-flaw-ins0mniahides-malicious-apps-which-run-forever/ http://www.homelandsecuritynewswire.com/dr20150814new-analysis-method-discovers-eleven-security-flaws-inpopular-internet-browsers h ...
Network+ Guide to Networks 6th Edition
... • Remains responsible for IP addressing and domain name management • IANA performs system administration ...
... • Remains responsible for IP addressing and domain name management • IANA performs system administration ...
Introduction to Computer Networks
... • Every node constructs a map of the connectivity to the network - a graph • Each node independently calculates the next best logical path from it to every possible destination in the network • The collection of best paths will then form the node’s routing table • OSPF relies on link state routing ...
... • Every node constructs a map of the connectivity to the network - a graph • Each node independently calculates the next best logical path from it to every possible destination in the network • The collection of best paths will then form the node’s routing table • OSPF relies on link state routing ...
document
... Enabling backward compatibility to protect investments Enabling development of software and hardware with common interfaces – Making worldwide networks possible; e.g., the Internet ...
... Enabling backward compatibility to protect investments Enabling development of software and hardware with common interfaces – Making worldwide networks possible; e.g., the Internet ...
Enter your project title here
... for other protocols within its – Traffic opaque to underlying IP backbone own packets. – IP backbone used as link-layer technology, where tunnel For example, IPX data packets can be forms a virtual point-to-point link in IP packets for transport encapsulated ...
... for other protocols within its – Traffic opaque to underlying IP backbone own packets. – IP backbone used as link-layer technology, where tunnel For example, IPX data packets can be forms a virtual point-to-point link in IP packets for transport encapsulated ...
Ethernet for Industrial Automation
... Network & Transport Layer, UDP vs. TCP Application Layer and interoperability Conclusions ...
... Network & Transport Layer, UDP vs. TCP Application Layer and interoperability Conclusions ...
Ethernet for Industrial Automation
... Network & Transport Layer, UDP vs. TCP Application Layer and interoperability Conclusions ...
... Network & Transport Layer, UDP vs. TCP Application Layer and interoperability Conclusions ...
ppt
... Simple case: socket name is the same as physical address. No mapping, we just need to break our message into frames…maybe Physical Layer – typically low bandwidth, serial, byte oriented Data link layer – read/write interface to the application frames: destination address, data, checksum. N ...
... Simple case: socket name is the same as physical address. No mapping, we just need to break our message into frames…maybe Physical Layer – typically low bandwidth, serial, byte oriented Data link layer – read/write interface to the application frames: destination address, data, checksum. N ...
Transport Layer
... acknowledgements (ACKs): receiver explicitly tells sender that pkt received OK negative acknowledgements (NAKs): receiver explicitly tells sender that pkt had errors sender retransmits pkt on receipt of NAK human scenarios using ACKs, NAKs? new mechanisms in rdt2.0 (beyond rdt1.0): ...
... acknowledgements (ACKs): receiver explicitly tells sender that pkt received OK negative acknowledgements (NAKs): receiver explicitly tells sender that pkt had errors sender retransmits pkt on receipt of NAK human scenarios using ACKs, NAKs? new mechanisms in rdt2.0 (beyond rdt1.0): ...
network
... e.g., WWW client (browser)/ server; email client/server peer-peer model: host interaction symmetric e.g.: Gnutella, KaZaA ...
... e.g., WWW client (browser)/ server; email client/server peer-peer model: host interaction symmetric e.g.: Gnutella, KaZaA ...
Applications
... size to the sender. This is done using the AdvertisedWindow field in the TCP header. The sender is then limited to having no more than a value of AdvertisedWindow bytes of unacknowledged data at any given time. The receiver selects a suitable value for AdvertisedWindow based on the amount of memory ...
... size to the sender. This is done using the AdvertisedWindow field in the TCP header. The sender is then limited to having no more than a value of AdvertisedWindow bytes of unacknowledged data at any given time. The receiver selects a suitable value for AdvertisedWindow based on the amount of memory ...
Transmission Control Protocol
... ordered stream of bytes. Sequence numbers are over bytes, not segments Initial sequence number is chosen randomly TCP is full duplex – numbering of data is independent in each direction Acknowledgement number – sequence number of the next byte expected from the sender ACKs are cumulative C ...
... ordered stream of bytes. Sequence numbers are over bytes, not segments Initial sequence number is chosen randomly TCP is full duplex – numbering of data is independent in each direction Acknowledgement number – sequence number of the next byte expected from the sender ACKs are cumulative C ...
Bridging the Gap
... – How do you protect the investment? @$1000/node* 50K nodes = $50,000,000 USD ...
... – How do you protect the investment? @$1000/node* 50K nodes = $50,000,000 USD ...
DoS
... • DoS is caused by asymmetric state allocation – If responder opens new state for each connection attempt, attacker can initiate thousands of connections from bogus or forged IP addresses ...
... • DoS is caused by asymmetric state allocation – If responder opens new state for each connection attempt, attacker can initiate thousands of connections from bogus or forged IP addresses ...
Presentation
... ‘RSVP is dead’ reports are exaggerated – QoS is complex – requires systems rather than individual protocol approach – more time required for development and acceptance ...
... ‘RSVP is dead’ reports are exaggerated – QoS is complex – requires systems rather than individual protocol approach – more time required for development and acceptance ...
Spanning-Tree Direct VS Indirect Link Failures
... gateway servicing hosts on the same subnet. VRRP introduces the concept of a “virtual router” that is addressed by IP clients requiring gateway service. The actual routing service is provided by physical routers running the VRRP protocol. An example of this is shown in Picture 2. Two or more physica ...
... gateway servicing hosts on the same subnet. VRRP introduces the concept of a “virtual router” that is addressed by IP clients requiring gateway service. The actual routing service is provided by physical routers running the VRRP protocol. An example of this is shown in Picture 2. Two or more physica ...
The OSI Model - La Salle University
... This suite includes the File Transfer Protocol (FTP), Telnet, the Hypertext Transfer Protocol (HTTP), e-mail protocols, and sometimes others. Although TCP fits well into the Transport layer of OSI and IP into the Network layer, the other programs fit rather loosely (but not neatly within a layer) ...
... This suite includes the File Transfer Protocol (FTP), Telnet, the Hypertext Transfer Protocol (HTTP), e-mail protocols, and sometimes others. Although TCP fits well into the Transport layer of OSI and IP into the Network layer, the other programs fit rather loosely (but not neatly within a layer) ...
Chapter 1
... involves a Layer 3 protocol. • Both routed and routing protocols. • Network optimization problems: • Usually involve a subset of users, applications, destinations, or a particular type of traffic. • Optimization issues in general can be more difficult to detect and even harder to isolate and diagnos ...
... involves a Layer 3 protocol. • Both routed and routing protocols. • Network optimization problems: • Usually involve a subset of users, applications, destinations, or a particular type of traffic. • Optimization issues in general can be more difficult to detect and even harder to isolate and diagnos ...
Ch 7 - Backbone
... When a packet needs to go from one switch to another • 16-byte VLAN tag inserted into the 802.3 packet by the sending switch When the IEEE 802.1q packet reaches its destination switch • Its header (VLAN tag) stripped off and Ethernet packet inside is sent to its destination computer ...
... When a packet needs to go from one switch to another • 16-byte VLAN tag inserted into the 802.3 packet by the sending switch When the IEEE 802.1q packet reaches its destination switch • Its header (VLAN tag) stripped off and Ethernet packet inside is sent to its destination computer ...
4th Edition: Chapter 1
... within a host. within same host, two processes communicate using inter-process ...
... within a host. within same host, two processes communicate using inter-process ...
Lecture01
... Protocol “Layers” Networks are complex! many “pieces”: hosts routers links of various media applications protocols hardware, software ...
... Protocol “Layers” Networks are complex! many “pieces”: hosts routers links of various media applications protocols hardware, software ...
Lecture 2 - Networking Devices
... First, bridging occurs at the data link layer or layer 2,while routing occurs at the network layer or layer 3 of the OSI model. Second, bridges use physical or MAC addresses to make data forwarding decisions. Routers use a different addressing scheme that occurs at layer three ...
... First, bridging occurs at the data link layer or layer 2,while routing occurs at the network layer or layer 3 of the OSI model. Second, bridges use physical or MAC addresses to make data forwarding decisions. Routers use a different addressing scheme that occurs at layer three ...
Internet protocol suite
The Internet protocol suite is the computer networking model and set of communications protocols used on the Internet and similar computer networks. It is commonly known as TCP/IP, because among many protocols, the Transmission Control Protocol (TCP) and the Internet Protocol (IP) is the accepted and most widely used protocol in Internet. Often also called the Internet model, it was originally also known as the DoD model, because the development of the networking model was funded by DARPA, an agency of the United States Department of Defense.TCP/IP provides end-to-end connectivity specifying how data should be packetized, addressed, transmitted, routed and received at the destination. This functionality is organized into four abstraction layers which are used to sort all related protocols according to the scope of networking involved. From lowest to highest, the layers are the link layer, containing communication technologies for a single network segment (link); the internet layer, connecting hosts across independent networks, thus establishing internetworking; the transport layer handling host-to-host communication; and the application layer, which provides process-to-process application data exchange.The TCP/IP model and related protocol models are maintained by the Internet Engineering Task Force (IETF).