Networking Final

The interface between the application process and the transport-layer is

a socket

A network-layer packet is called a

Datagram

In the traditional routing model, as opposed to SDN, a router uses the packet's __________ to forward the packet.

Destination address

__________ applications make use of all available throughput.

Elastic

Both ARP query and response packets are sent within a broadcast frame.

False

HTTP determines how a web page is interpreted by a client.

False

ICMP messages are carried in TCP segments.

False

IPv6 allows fragmentation at intermediate routers.

False

In DASH, a video segment is encoded at a specific bit rate after it has been requested by a client.

False

TCP and UDP both provide throughput and timing guarantees.

False

The 802.11 MAC protocol implements collision detection.

False

The distance-vector algorithm uses global knowledge about the network.

False

With a best-effort service, packets are guaranteed to be received in the order in which they were sent.

False

With a best-effort service, timing between packets is guaranteed to be preserved.

False

The internet protocol stack described in the text has __________ layers.

5

Which of the following causes Traceroute to stop sending UDP packets? q

A port unreachable message is received.

A protocol defines which of the following?

All of the above are true.

An IP address is associated with

An interface

Once a datagram is fragmented, where is it reassembled?

At the destination end system.

All autonomous systems run the same inter-AS routing protocol. This protocol is known as __________ .

BGP

Which of the following is NOT a channel partitioning protocol?

CSMA

Since an HTTP server is stateless, which of the following allows a Web site to identify users?

Cookies

Match the description with the associated random access protocol.

Fully Decentralized: ALOHA Nodes are synchronized: Slotted ALOHA Listen before transmitting: CSMA Stops transmitting if interference is detected: CSMA/CD

The Web's application-layer protocol is

HTTP

The network layer provides a service between

Hosts

Each entry in a switch table does NOT contain which of the following?

IP Address

Which of the following switching fabric types can forward multiple packets in parallel?

Interconnection network.

OSPF is an example of an __________ routing protocol.

Intra-AS

A link-layer address is called a

LAN Address Physical Address Mac Address

OSPF is a __________ protocol.

Link-State

__________ is a general term for "stuff" that can infect computational devices.

Malware

Two fundamental approaches to moving data through a network of links and switches are circuit switching and __________ switching.

Packet

The count-to-infinity problem can be avoided using a technique known as __________ .

Poisoned Reverse

Which of the following layers of the OSI model provides compression and encryption services?

Presentation

Which of the following depends on the physical medium of the link between two nodes?

Propagation Delay

Which of the following is the delay associated with a packet waiting to be transmitted onto the link?

Queuing Delay

Which of the following is unguided physical media?

Radio Waves

The first line of an HTTP request message is called the

Request Line

In our class, RFC stands for __________ .

Request for Comment

Which of the following is not a mail access protocol?

SMTP

__________ is the principal application-layer protocol for Internet electronic mail.

SMTP

Which of the following provides the full bandwidth to a single circuit for a brief time interval?

TDM

OpenFlow's match abstraction allows for a match to be made on selected fields from __________ layers of protocol headers.

Three

A "match-plus-action" table generalizes the notion of a destination-based forwarding table.

True

A DHCP offer message is broadcast to all nodes on the subnet.

True

A collision occurs when multiple nodes transmit frames simultaneously.

True

According to the OpenFlow specification, a flow table entry may have wildcards.

True

Both ARP query and response packets have the same format.

True

In a decentralized routing algorithm, the routers will calculate the least-cost path in an iterative and distributed manner.

True

OpenFlow is implemented in most, if not all, SDN controllers.

True

Packets sent from one end system to another may follow different paths through the network.

True

The 802.11 MAC protocol implements collision detection.

True

The Internet can be described as a "network of networks".

True

The link-state algorithm discussed in class is known as Dijkstra's algorithm.

True

The most popular P2P file distribution protocol at the time of publication of the text is BitTorrent.

True

The traditional telephone network is an example of a circuit-switched network.

True

UDP provides an unreliable data transfer service.

True

A host on the internet is identified by

an IP address.

The link layer is implemented in

both hardware and software.

OSPF link weights/costs are

configured by the network administrator.

Consider a router with a full finite buffer and a packet arrival rate that exceeds the output link capacity of the router. When a new packet arrives, the router will __________ .

drop the incoming packet.

Consider the Border Gateway Protocol. A gateway router runs the __________ protocol.

eBGP and iBGP

The TTL field in a datagram header is decremented by one

each time the datagram is processed by a router.

The term used to describe passing data from a higher layer to a lower layer and appending additional information is called __________ .

encapsulation

A link-layer packet is called a

frame

Error detection in the link layer is implemented in

hardware

Network-layer services are implemented

in routers in the network core. and in the end systems.

DNS queries typically

include both recursive and iterative queries.

ICMP is used by hosts and routers to communicate __________ information.

network-layer

The general term for a chunk of data sent across the network is a __________ .

packet

The 802.11 protocol employs RTS and CTS control frames to

reserve access to the channel.

The 8-byte preamble in an ethernet frame serves to

synchronize the receiver with the sender.

ICMP messages contain __________ in addition to a type and code field.

the first few bytes of an IP datagram

All DNS query and reply messages are sent

within UDP datagrams.