networking application layer

What part of the URL, http:1//www.cisco2.com/index.html, represents the top-level DNS domain? http www .com index

.com

What message type is used by an HTTP client to request data from a web server? POST GET ACK PUT

GET

Which three protocols or standards are used at the application layer of the TCP/IP model? (Choose three.) UDP IP GIF HTTP MPEG TCP

HTTP / GIF / MPEG

On a home network, which device is most likely to provide dynamic IPv4 addressing to clients on the home network? a - a home router b - a DNS server c - an ISP DHCP server d - a dedicated file server

a

what is the purpose of the HTTP GET message? a - The HTTP GET request message is used by a web client to request a web server to send the requested object from the server to the client. b - The HTTP GET request message is sent by a web server to a web client to get the next request from the web client. c - The HTTP GET request message is sent by a web server to a web client to get the identity of the web client. d - The HTTP GET request message is used by a web client to post an object on a web server.

a

which of the characteristics below are associated with a P2P approach to structuring network applications (as opposed to a client-server approach)? a - there is not a server that is always on b - there is a server that is always on c - a process requests service from those it contacts and will provide service to processes that contact it d - HTTP uses this application structure e - there is a server with a well known server IP address

a / c

when an application uses a UDP socket, what transport services are provided to the application by UDP? check all that apply a - real-time delivery. the service will guarantee that data will be delivered to the reciever within a spcified time bound b - congestion control. the service will control senders so that the senders do not collectively send more data than links in the network can handle c - flow control. the provided service will ensure that the sender does not send so fast as to overflow reciever buffers d - best effort service. the service will make a best effort to deliver data to the destination but makes no guarantees that any particular segment of data will actually get there e - loss-free data transfer. the service will reliably transfer all data to the reciever, recovering from packets dropped in the network due to router buffer overflow f - throughput guarantee. the socket can be configured to

d best effort

when an application uses a TCP socket, what transport services are provided to the application by TCP? check all that apply a - real-time delivery. the service will guarantee that data will be delivered to the reciever within a spcified time bound b - congestion control. the service will control senders so that the senders do not collectively send more data than links in the network can handle c - flow control. the provided service will ensure that the sender does not send so fast as to overflow reciever buffers d - best effort service. the service will make a best effort to deliver data to the destination but makes no guarantees that any particular segment of data will actually get there e - loss-free data transfer. the service will reliably transfer all data to the reciever, recovering from packets dropped in the network due to router buffer overflow f - throughput guarantee. the socket can be configured to

b / c / e (congestion contro, flow control, loss-free)

which of the characteristics below are associated with a client-server approach to structuring network applications (as opposed to a P2P approach)? a - there is not a server that is always on b - there is a server that is always on c - a process requests service from those it contacts and will provide service to processes that contact it d - HTTP uses this application structure e - there is a server with a well known server IP address

b / d / e

What information does the type "A" resource record hold in the DNS database? Check all that apply. a - A domain name and the name of the authoritative name server for that domain. b - A name and the name of the SMTP server associated with that name. c - A hostname and an IP address. d - An alias name and a true name for a server.

c

what is the role of an authoritative name server in the DNS? a - it is a local (to the querying host) server that cahces name-to-IP address translation pairs, so it can answer authoritatively and can do so quickly b - it provides the IP address to the DNS server that can provide the definitive answer to the query c - it provides the definitive answer to the query with respect to a name in the authoritative name server's domain d - it provides a list of TLD servers that can be queried to find the IP address of the DNS server that can provide the definitive answer to this query

c