Sigurnost bezicnih racunalnih mreza
... o Vulnerable to IP address spoofing attacks o The intruder transmits packets from the outside with a source IP address set to an address of an internal host o Countermeasure: discard any packet with an internal source address if the packet arrives on an external interface ...
... o Vulnerable to IP address spoofing attacks o The intruder transmits packets from the outside with a source IP address set to an address of an internal host o Countermeasure: discard any packet with an internal source address if the packet arrives on an external interface ...
Document
... – when buffers full, packets will be discarded » the destination will detect missing packets and request retransmission - probably along the same path as before ...
... – when buffers full, packets will be discarded » the destination will detect missing packets and request retransmission - probably along the same path as before ...
21netsec
... Attacker can evade if detection algorithm is known, but detector can vary parameters slide 24 ...
... Attacker can evade if detection algorithm is known, but detector can vary parameters slide 24 ...
Ping, traceroute, etc.
... particular Web pages. For example, in the URL http://www.pcwebopedia.com/index.html, the domain name is pcwebopedia.com. ...
... particular Web pages. For example, in the URL http://www.pcwebopedia.com/index.html, the domain name is pcwebopedia.com. ...
ppt
... – All nodes have the same link-state database – All nodes forward packets on shortest paths – The next router on the path forwards to the next hop ...
... – All nodes have the same link-state database – All nodes forward packets on shortest paths – The next router on the path forwards to the next hop ...
Games and the Impossibility of Realizable Ideal Functionality
... Receivers can specify what packets they want How: Sender requests capability in SYN packet Path identifier used to limit # reqs from one source Receiver responds with capability Sender includes capability in all future packets ...
... Receivers can specify what packets they want How: Sender requests capability in SYN packet Path identifier used to limit # reqs from one source Receiver responds with capability Sender includes capability in all future packets ...
Communication Network Protocols
... Protocol Suit & Protocol Implementation • Layers for a standardized network architecture and the associated protocols are referred as protocol suite. • Each protocol object has function specification and two different interfaces – service interface: defines operations on this protocol – peer-to-pee ...
... Protocol Suit & Protocol Implementation • Layers for a standardized network architecture and the associated protocols are referred as protocol suite. • Each protocol object has function specification and two different interfaces – service interface: defines operations on this protocol – peer-to-pee ...
NET331_Ch8+Ch20
... The header is 20 to 60 bytes in length and contains information essential to routing. Source address. This 32-bit field defines the IPv4 address of the source. This field must remain unchanged during the time the IPv4 datagram travels from the source host to the destination host. Destination address ...
... The header is 20 to 60 bytes in length and contains information essential to routing. Source address. This 32-bit field defines the IPv4 address of the source. This field must remain unchanged during the time the IPv4 datagram travels from the source host to the destination host. Destination address ...
Solution to test 2
... Assume the followings: All routers inside the network turn off the support for subnet-directed and all-subnet-directed IP broadcasts, i.e., drop those packets. All nodes (hosts and routers) must reply with an ICMP echo reply message when receiving an ICMP echo request message. When forwarding ...
... Assume the followings: All routers inside the network turn off the support for subnet-directed and all-subnet-directed IP broadcasts, i.e., drop those packets. All nodes (hosts and routers) must reply with an ICMP echo reply message when receiving an ICMP echo request message. When forwarding ...
8085 Architecture & Its Assembly language programming
... • The statistical counters all have addressoffsets in the range 0x04000 – 0x04FFF • You can use a very simple program-loop to ‘clear’ each of these read-only registers // Here ‘io’ is the virtual base-address // of the nic’s i/o-memory region ...
... • The statistical counters all have addressoffsets in the range 0x04000 – 0x04FFF • You can use a very simple program-loop to ‘clear’ each of these read-only registers // Here ‘io’ is the virtual base-address // of the nic’s i/o-memory region ...
Week 10
... •When A sends to C, all the switches see the packet and learn where A is. •When C sends to A, the packet is routed directly to A, and B4 does not ...
... •When A sends to C, all the switches see the packet and learn where A is. •When C sends to A, the packet is routed directly to A, and B4 does not ...
Lecturing Notes 1
... – Refer to a set of techniques to detect and correct data losses – Two levels of error control » Bit-level: inversion of 0 bit to 1, or 1 bit to 0, also called bit corruption => often occur over the mobile and wireless networks » Packet-level: packet loss, duplications, reordering => often occur and ...
... – Refer to a set of techniques to detect and correct data losses – Two levels of error control » Bit-level: inversion of 0 bit to 1, or 1 bit to 0, also called bit corruption => often occur over the mobile and wireless networks » Packet-level: packet loss, duplications, reordering => often occur and ...
Networks - What are They
... Addressing and control mechanism Virtual networks Most contemporary communications networks can be viewed as Hierarchy of virtual networks Have talked about the hardware This is the lowest layer Often called the physical layer Above the hardware Varying number of software layers or levels At each le ...
... Addressing and control mechanism Virtual networks Most contemporary communications networks can be viewed as Hierarchy of virtual networks Have talked about the hardware This is the lowest layer Often called the physical layer Above the hardware Varying number of software layers or levels At each le ...
slides - network systems lab @ sfu
... increase n, higher probability that 2 or more chunks will be lost ...
... increase n, higher probability that 2 or more chunks will be lost ...
The fundamentals of TCP/IP networking
... Error functions to determine the most likely way a packet will travel to it destination. What Traceroute does is principally this. First ping the destination with a TTL of 1. The packet will be discarded by the local router when it decrements TTL and it will send an ICMP error back, from which Trace ...
... Error functions to determine the most likely way a packet will travel to it destination. What Traceroute does is principally this. First ping the destination with a TTL of 1. The packet will be discarded by the local router when it decrements TTL and it will send an ICMP error back, from which Trace ...
In VINI Veritas - Georgia Institute of Technology
... • First experiment: Internet In A Slice – XORP open-source routing protocol suite (NSDI ’05) – Click modular router (TOCS ’00, SOSP ’99) ...
... • First experiment: Internet In A Slice – XORP open-source routing protocol suite (NSDI ’05) – Click modular router (TOCS ’00, SOSP ’99) ...
