Deck 21: Internetwork Operation

Question 1

When the mobile node moves its attachment point to another network,that network is considered a foreign network for this host.

Answer 1

True

Question 2

Intermediate results sent to all participants is _________ .

A)real-time workgroup
B)multimedia
C)distributed computation
D)teleconferencing

Answer 2

C

Question 3

Each router must determine multicast routing paths on the basis of both source and destination addresses.

Answer 3

True

Question 4

OpenFlow can be used with network traffic involving a variety of protocols and network services.

Question 5

A membership query message is sent by a multicast router.

Question 6

In ordinary ________ transmission over an internet,in which each datagram has a unique destination network,the task of each router is to forward the datagram along the shortest path from that router to the destination network.

A)multicast
B)multimedia
C)unicast
D)teleconferencing

Question 7

The SDN controller defines the data flows that occur in the SDN data plane.

Question 8

Spamming of multicast groups is difficult.

Question 9

The host portion of an IP address is used by routers to move a datagram from the source computer to the network to which the target computer is attached.

Question 10

IGMP _____ enabled a host to request to be unsubscribed from a group.

A)v1
B)v2
C)v3
D)v4

Question 11

Files,graphics,and messages exchanged among active group members in real time is _________ .

A)multimedia
B)real-time workgroup
C)teleconferencing
D)distributed computation

Question 12

IGMP takes advantage of the broadcast nature of a LAN to provide an efficient technique for the exchange of information among multiple hosts and routers.

Question 13

Minimal encapsulation results in less overhead and can be used if the mobile node,home agent,and foreign agent all agree to do so.

Question 14

In multicasting only a single copy of the packet is ever transmitted.

Question 15

The sparse-mode protocol is appropriate for intra-AS multicast routing and may be viewed as a potential alternative to a multicast version of OSPF known as MOSPF.

Question 16

A general query is used to learn which groups have members on an attached network.

Question 17

In a true multicast strategy the packet is replicated by routers only at branch points of the spanning tree.

Question 18

A group of workstations that form a multicast group such that a transmission from any member is received by all other group members is _____________.

A)teleconferencing
B)distributed computation
C)real-time workgroup
D)multimedia

Question 19

A packet with a multicast address is transmitted on a LAN segment.

Question 20

With unicast transmission,the router may be required to forward two or more copies of an incoming datagram.

Question 21

__________ describe packet forwarding,packet modification,and group table processing operations.

A)Actions
B)Cookies
C)Data planes
D)Flows

Question 22

________ is a consortium of software providers,content delivery networks,and networking equipment vendors whose purpose is to promote software-defined networking.

Question 23

The act of sending a packet from a source to the members of a multicast group is referred to as __________ .

Question 24

IGMP _____ allows hosts to specify the list of hosts from which they want to receive traffic.

A)v1
B)v2
C)v3
D)v4

Question 25

A _______ query is used to learn if any attached device desires reception of packets sent to a specified multicast address,from any of a specified list of sources.

Question 26

_________ is a subtype of a membership query message.

A)General query
B)Group-specific query
C)Group-and-source specific query
D)All of the above

Question 27

A ________ query is used to learn if a particular group has any members on an attached network.

Question 28

________ is a reason for using SDN domains.

A)Scalability
B)Privacy
C)Incremental deployment
D)All of the above

Question 29

In IGMP _____ hosts could join a multicast group and routers used a timer to unsubscribe group members.

A)v1
B)v2
C)v3
D)v4

Question 30

A(n)________ is a sequence of packets traversing a network that share a set of header field values.

A)flow
B)action set
C)API
D)SDN data plane

Question 31

The basic building block of the logical switch architecture is the ________.

A)cookie
B)flow table
C)action set
D)all of the above

Question 32

_________ is an opaque data value chosen by the controller and may be used by the controller to filter flow statistics,flow modifications,and flow deletion.

A)Counter
B)Match field
C)Cookie
D)Priority

Question 33

The current version of IGMP defines two message types: Membership Query and ________ .

Question 34

The OpenFlow protocol supports ____________ messages.

A)controller-to-switch
B)asynchronous
C)symmetric
D)all of the above

Question 35

IP addresses that refer to a group of hosts on one or more networks are referred to as __________ addresses.

Question 36

IGMP,defined in RFC ______ ,is used by hosts and routers to exchange multicast group membership information over a LAN.

Question 37

A host or a router is a(n)_________ .

A)link
B)node
C)action
D)foreign agent

Question 38

______ is a separate routing protocol,independent of any existing unicast routing protocol,and is designed to extract needed routing information from any unicast routing protocol and may work across multiple ASs with a number of different unicast routing protocols.

Question 39

PIM defines two modes of operation: dense-mode protocol and ______ protocol.

Question 40

One way to assure that the packet is received by all members of the group is to ________ a copy of each packet to each network in the configuration,over the least-cost route for each network.

Question 41

The OpenFlow specification defines three types of tables: flow table,group table,and _______ table.

Question 42

A ________ is a host or router that changes its point of attachment from one network or subnetwork to another.

Question 43

The __________ is an index that identifies a security context between a pair of nodes which is configured so that the two nodes share a secret key and parameters relevant to this association.

Question 44

A mobile node is assigned to a particular network,known as its ______ .

Question 45

The ____________ is an Internet protocol,defined in RFC 2131,that enables dynamic allocation of IP addresses to hosts.