Local Area Network

Centralized security management.

true or false.all transport layer protocols are concerned with reliability

The purpose of ayering is to separate functional components that interact in some sequential and hierarchical way, with each layer usually having an interface only to the layer above it and the layer below it.

I assume you are logging into the default gateway because you wish to change something in the configuration (that is really the only reason for requiring authentication in a DG).

If you don't know the userid and password you will need to find someone who does. Unless you are responsible for that DG they aren't likely to tell you.

BootP (RFC951) provides

* a unique IP address to the requester (using port 67) similar to the DHCP request on port 68 AND * can provide (where supported) the ability to boot a system without a hard drive (ie: a diskless client) Apple OS X 10.* Server supports BootP (albeit) renamed as NetBoot. The facility allows the Admin to maintain a selected set of configurations as boot images and then assign sets of client systems to share(or boot from) that image. For example Accounting, Management, and Engineering departments have elements in common, but which can be unique from other departments. Performing upgrades and maintenance on three images is far more productive that working on all client systems individually.

Startup is obviously network intensive, and beyond 40-50 clients, the Admin needs to

carefully subnet the infrastructure, use gigabit switches, and host the images local to the clients to avoid saturating the network. This will expand the number of BootP servers and multiply the number of images, but the productivity of 1 BootP server per 50 clients is undeniable :)

Sunmicro, Linux, and AIX RS/600 all support BootP.

Todate, Windows does not support booting "diskless clients".

The DNS is a server which masks your public IP, whereas DHCP is a server which automatically assigns a Dynamic IP adress

I wouldn't exactly say "mask". Dns just puts a nice easy name to an ip, like google, or hotmail etc... DHCP just gives out ip addresses.

decapsulates the Layer 3 packet by stripping off the Layer 2 frame header

uses the destination IP Address in the IP header to look up the next-hop address in the routing table

encapsulates the Layer 3 packet into the new Layer 2 frame and forwards it out the exit interface

Class D and E are reserved for special purposes. A Class D is 1110 the decimal range will be 224-239. Class E is reserved for InterNIC experiments.

If the sending and receiving protocols are different, then you have a mismatch. Think of a speaker using French but the receiver only understanding Spanish. They will not be able to understand each other, and this is what happens with network protocols.

They can see the communication but have no clue about the content or what to do with the request.

WAN.

LAN is a short range connection, WAN is wide range.

Connection-oriented

forward slash

Protocol Analyzer

Conan is on cable because Conan quit network TV because he did not want his show on at midnight.

thousands

Request and Reply

R1(Config)#ip route x.x.x.x y.y.y.y z.z.z.z

X will be the source network

Y will be the source network's subnet mask

Z will be the destination network.

*Note you can also set the destination as an outbound interface.

VNC stands for Virtual Network Computing. It is a graphics based system that allows computers to communicate with each other over a 'virtual' network. This means people can access their work computers at home, or their home computers at work.

DHCP Stands for Dynamic Host Configuration Protocol. A Computer network protocol also known as Client/Server protocol.

The DHCP automatically provides an IP address and other related configuration information such as the subnet mask and default gateway.

There are couple solutions. One of them is just to buy a powerful router ($100 and more range) and good wireless cards. Another solution is more complicated and it's based on so called "bridge". To create a bridge you need to have two routers (it's highly recommended to use the same brand and model) supporting bridge technology and of course wireless routers or lan cables to connect computers inside of the houses to routers.

First solution is cheaper but has shorter range. Second is more expensive but has longer range.

In this type of switching, the entire frame is read and stored in memory before being sent to the destination device. The switch checks the integrity of the bits in the frame by recalculating the cyclic redundancy check (CRC) value. If the calculated CRC value is the same as the CRC field value in the frame, the switch forwards the frame out the destination port. The switch does not forward frames if the CRC values do not match. The CRC value is located within the frame check sequence (FCS) field of an Ethernet frame.

Although this method keeps damaged frames from being switched to other network segments, it introduces the highest amount of latency. Due to the latency incurred by the store and forward method, it is typically only used in environments where errors are likely to occur, such as environments that have a high probability of EMI.

token passing

LAN speeds are measured in units of millions of bits per second (mbps) or billions of bits per second (gbps)

If something is informal, it does not have set rules.