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Computer Networking
Computer networks are collections of computers which are connected together in order to communicate and transfer information. Questions about computer networks, networking protocols, and how to set them up belong here.
18,810 Questions
What will happen if you enable both wireless and lan connection?
They will both work. I would imagine the interrupt levels will determine which one will intercept the traffic from a request first. i.e browser, explorer, ping Any request made through one adapter will receive back to the same adapter. That is to say - if you make a browser request to the internet and it goes out on the wired adapter, it will come back to that same adapter. The end-to-end addressing is in the message traffic, and whatever adapter address (MAC address) is passed outbound will be in the addressing in the incoming message, and consequently go to that (MAC) address. I would think if the wired adapter is busy and you made a request, the request would be honored by the wireless adapter, and the answer would come back to that adapter. I believe it would also look to be simultaneous, even though that is a tricky concept, considering it's all serial to and through the modem/gateway.
Is a listening port the same as an open port?
Ports are somewhat like doors, traffic can flow either way though them but you can set them up so that it can only flow one way. A listening port is open and waiting for something to come in. It is possible to configure things so that a port can be used to receive traffic, but not send anything out through it. It is also possible to configure things so that a port is not listening but it is open for SENDING out information. Usually when we speak of an "open port" it is open for traffic both ways.
What happens if duplicate addresses exists on a lan?
Any attempt to use an already existing address on a LAN will be rejected, and the second or succeeding system will have their address set to 0.0.0.0.
Duplicate addresses are not allowed in a LAN; the addresses must be unique.
What is a Mac address and what is the bit size of a Mac address in a nic?
MAC bit size is 16 digits. but MAC bit is 48 each.
What keys besides the typical alphabetic and numeric keys are including on a keyboard?
alt crtl esc ect
What are some properties of contention-based media access for a shared media?
3. Which options are properties of contention-based media access for a shared media? (Choose three.) (Points: 1)
non-deterministic
less overhead
one station transmit at a time
collisions exist
token passing
How explain the the basis for determining the Minimum Frame Size in Ethernet?
Size is 64 bytes.
Destination Address (6 bytes)
Source Address (6 bytes)
Frame Type (2 bytes)
Data (46 bytes)
CRC Checksum (4 bytes)
46 bytes must be transmitted at a minumum, with additional pad bytes added to meet frame requirements.
There is a fundamental minimum frame size imposed by the headers, but that isn't it.
Think back to the days when ethernet was a multi-drop fat yellow coax, rather than the mesh of switched point to point cat5 links it is today.
A sender needed to send the packet and determine whether or not it got received by others on the wire. Reasons why it might not get received were mostly down to collisions with other transmitters transmitting on the same wire at the same time.
To determine if there was a collision, the sender listened to his own transmission to see if it could be recieved. If it was garbled due to a collision, it would know. Hence the name CSMA/CD (Carrier Sense Multiple Access with *Collision Detect*).
However transit time down the wire isn't instantaneous. If you could send a tiny packet at the same time as someone at the far end of the wire, a receiver in the middle of the wire might receive both signals at the same time, garbled, yet they pass over each other and get received by the far ends just fine. So they think the guy in the middle got it, but it didn't, thus breaking the Ethernet model on which 802.1D relies.
To prevent this, you want the head of the packet to transit from one end of the wire and back again before the tail of the packet finished transmission. If there's a transmission anywhere on the wire overlapping, you'll hear it collide at your receiver.
The maximum transmission time is lengthened by repeaters. You need to account for the time to transit through the maximum number of wires and repeaters on a LAN segment.
The header length issue is a red herring. The transit time is independent of bit rate. So as bit rates go up, the header length goes down. So trying to use header size to determine that the packet is long enough is not safe. Safe at 10MBPS might not be safe at 100MBPS, hence the need for a time based packet length minimum.
In short, the packet has to be long enough for the collision detect part of the CSMA/CD algorithm to work.
What is the most secure authentication protocol that will support mutual authentication?
One such protocol option is RMAPSM, developed by Uniken. There are over a million combined users to date. It is based on the REL-IDSM (Relative Identity) platform. For more details, visit:
uniken.com/security/red_id.php
Which type of traffic can still be received on a switch interface that is in STP blocking mode?
BPDU frames
What are the feature that distiguish a man from a lan and wan?
by man im assuming you mean a node/client. Lan is intranet wan is internet. on the lan the node has a ip that it talks to other nodes with, on wan your computer's ip talks to your modem which talks to the internet with the modems IP.
Hope that helped.
2 wire switch to 3 wire switch?
This question does not make any sense at all. Please log in and edit this answer to explain exactly what you want to know. Then someone else may be able to give you a more useful answer.
Will a Belkin usb g network adapter work with wpa security?
It depends on adapter. Nowaday all adapters support wpa security.
What statement correctly describes a feasible successor in EIGRP?
It is a backup route that is stored in the topology table.
How can you connect two computers physically?
You can use a null-modem cable; alternately, you can use a USB or FireWire cable.
What is the host range for 184.192.125.33?
Not enough information. You also need the subnet mask. For example, if the subnet mask 255.255.255.0 is used (this is quite common), the subnet range is from 0-255 (in the last byte - keep the other bytes as they are), but the first and last of these addresses are reserved for special purposes, and can't be assigned for hosts. Therefore, the host range has addresses 1-254 in the last byte.
Does Twitter keep records of how many accounts have been suspended on a specific ip address?
No, Twitter does not keep the number of accounts that they have suspended on a specific IP address.
What sends packets to the destination address?
Packets are sent to the destination address by network devices such as routers and switches. When a device wants to communicate over a network, it encapsulates data into packets and includes the destination address in the packet header. Routers use routing tables to determine the best path for the packets, forwarding them through various network segments until they reach their intended destination.
What is the meaning of Explicit route in MPLS?
MPLS (MultiProtocol Label Switching) - a standard from the IETF for including routing information in the packets of an IP network. MPLS is used to ensure that all packets in a particular flow take the same route over a backbone. Deployed by many telcos and service providers, MPLS can deliver the quality of service (QoS) required to support real-time voice and video as well as service level agreements (SLAs) that guarantee bandwidth. Large enterprises may also use MPLS in their national networks.
Similar to Cisco's tag switching, an MPLS router attaches labels (tags) containing forwarding information to outgoing IP packets. These "label edge routers" (LERs) sit at the edge of the network and perform the complex packet analysis and classification before the packet enters the core of the network. The routers within the core, known as "label switch routers" (LSRs), quickly examine the label and forward the packet per its directions without having to look up data in tables and compute the forwarding path each time. The edge routers at the receiving end remove the labels.
Following in the tradition of the "dumb network," MPLS enables more decisions to be made at the periphery of the network.
An MPLS Core
Using IP and MPLS in the core, a service provider can offer its customers a virtual private VPN service for IP traffic and guarantee bandwidth for real-time voice and video.
EXPLICIT ROUTE:
As the name itself suggest it is a pre-determined explicit path through the MPLS core. In explicit routing, the route the LSP takes is defined by the ingress node. The path consists of a series of hops defined by the ingress LSR. Each hop can be a traditional interface, an autonomous system, or an LSP. A hop can be strict or loose.
A strict hop must be directly connected (that is, adjacent) to the previous node in the path. A loose hop is not necessarily directly connected to the previous node; whether it is directly connected is unknown.
The sequence of hops comprising an explicit routing LSP may be chosen in either of the following ways:
- Through a user-defined configuration, resulting in configured explicit paths. When you create the explicit route, you must manually configure each hop in the path.
- Through a routing protocol-defined configuration, resulting in dynamic explicit paths. When the routing protocol (IS-IS or OSPF) creates the explicit path, it makes use of the topological information learned from a link state database in order to compute the entire path, beginning at the ingress node and ending at the egress node
Which of the following contained in the routing updates of classles routing protocols?
The question is incomplete.
No options (for which of the following) are given to answer the question.
