CPSC 353 Ch5
MOSPF is an extension to OSPF that provides support for Mobile networks Multicast routing Messaging applications Mesh networks
Multicast routing
The Structure of Management Information (SMI) is a data definition language that is used to define the objects in a Management Information Base True False
True
The original purpose of the ICMP source quench message was to perform congestion control True False
True
The two approaches to computing forwarding tables are: per-router control and logically centralized control True False
True
RIP uses the services of _______. TCP UDP IP None of the choices are correct
UDP
The SNMP PDU is typically carried in the payload of a _________________ UDP datagram TCP segment
UDP datagram
In RIP, the ________ timer controls the validity of the route. garbage collection expiration periodic None of the choices are correct
expiration
In distance vector routing, each node periodically shares its routing table with _________ and whenever there is a change. every other node its immediate neighbors one neighbor None of the choices are correct
its immediate neighbors
Routing algorithms with global state information are often referred to as ___________ algorithms.
link state
Fill in the blank: SNMP is an acronym for Simple Network ________________ Protocol
management
In a graph G = (N, E), a node y is said to be a _________ of node x if (x,y) belongs to E
neighbor
ICMP is a (an) _________ layer protocol. application-layer protocol that helps TCP/IP at the network layer transport-layer protocol that helps TCP/IP at the network layer network-layer protocol. data-link layer protocol that helps TCP/IP at the network layer
network-layer protocol
In OSPF, a ________ link connects two routers without any other host or router in between. point-to-point transient stub None of the choices are correct
point-to-point
In routing among ASs, which of the following issues dominates: number of AS s transversed current congestion levels in the AS s policy
policy
In _________ routing algorithms, routes change very slowly over time, often as a result of human intervention.
static
A one-to-one communication between one source and one destination is classified as a _______ communication. unicast multicast broadcast None of the choices are correct
unicast
In ______, the router forwards the received packet through only one of its interfaces. unicasting multicasting broadcasting None of the choices are correct
unicasting
Which is not one of the layers of an SDN controller A communications layer A network wide a quality of service
A quality of service
BGP is an acronym for
Border Gateway Protocol
As part of hierarchical routing, hot-potato routing does the following: Determines the number of ASes in the shortest AS path from router to destination. Chooses the gateway that has the smallest cost. Provides information to a router about the existence of external networks. Labels suspicious packets as "hot".
Chooses gateway that has the smallest cost
In OpenFlow, which of the following is a message from the controller to the controlled switch Flow-removed Configuration Port-status
Configuration
Which is not a BGP attribute ORIGIN AS_PATH NEXT_HOP DESTINATION
DESTINATION
A centralized routing algorithm computers the least-cost path between a source and destination in an iterative, distributed manner. True False
False
Every autonomous system must use the same intra-autonomous system routing algorithm. True False
False
ICMP messages are carried in UDP datagrams True False
False
ICMP messages have a type and a code field and contain the first 12 bytes of the IP datagram that caused the ICMP message to be generated True False
False
In a distance-vector routing algorithm, each node has a map of the entire network and determines the shortest path from itself to all other nodes in the network. True False
False
In the BGP routing algorithm, each AS advertises to its neighbors its estimates of the shortest distances from the AS to all possible destination ASs. True False
False
Inter-AS routing is routing among hosts and routers in the same AS True False
False
OSPF uses BGP for routing among areas. True False
False
SNMP is a network layer protocol True False
False
The SNMP "Trap" message is sent by a managed entity to inform a managing entity of an exceptional event, and requires that the managing entity respond to the event via a "SetRequest" message. True False
False
The distance-vector algorithm is a link-state algorithm True False
False
The management information base (MIB) is a repository of data maintained at a managing entity site, providing the network manager with a centralized, quick-to-query database regarding current network status. True False
False
In OpenFlow, which of the following is a message from the controlled switch to the controller Modify-State Read-State Send-Packet Packet-In
Packet-In
The Internet's OSPF routing protocol is often accomplished by a link-state broadcast algorithm True False
True
Which of the following is not a key characteristic of an SDN architecture Flow-based forwarding Separation of data plane and control plane Routing Algorithms running in each router Network control functions external to data-plane switches A programmable network
Routing Algorithms running in each router
SDN is an Acronym for
Software Defined Networking
The OpenFlow Protocol operates over UDP TCP FTP
TCP
Which of the following statements best describes the purpose of the SNMP protocol: The SNMP protocol specifies the actions a network manager should take in response to a specific set of network fault conditions. The SNMP protocol is a tool for gathering data about network conditions and executing remote actions at remote managed devices The SNMP protocol is used by the network manager to provision resources, such as bandwidth, server capacity and other computational/communication resources needed to meet the mission-specific needs of an enterprise
The SNMP protocol is a tool for gathering data about network conditions and executing remote actions at remote managed devices
Which of the following statements best describes the purpose of the SNMP protocol: The SNMP protocol specifies the actions a network manager should take in response to a specific set of network fault conditions. The SNMP protocol is used to convey network management control and information messages between a managing server and an agent executing on behalf of that managing server. The SNMP protocol is used by the network manager to provision resources, such as bandwidth, server capacity and other computational/communication resources needed to meet the mission-specific needs of an enterprise
The SNMP protocol is used to convey network management control and information messages between a managing server and an agent executing on behalf of that managing server.
What is the purpose of the SNMP SetRequest message? To allow a managing entity to query the value of a set of MIB object values in a managed device. To allow a managing entity to set the value of one or more MIB objects in a managed device. To allow a managed device to request and receive a set of initial values for MIB objects in the managed device
To allow a managing entity to set the value of one or more MIB objects in a managed device.
BGP is a path vector protocol True False
True
Exchanges between OSPF routers can be authenticated True False
True
In BGP jargon, a route is a prefix along with its BGP attributes True False
True
In BGP, a route consists of a prefix plus attributes True False
True
In hot potato routing, the route chosen is the route with the least cost to the NEXT-HOP router True False
True
OSPF and RIP are intra-AS routing protocols True False
True
"AS" is an acronym for:
autonomous system
A one-to-all communication between one source and all hosts on a network is classified as a _______ communication. unicast multicast broadcast None of the choices are correct
broadcast
Fill in the blank: ICMP is an acronym for Internet _____________ Message Protocol
control
In _______ routing, the least cost route between any two nodes is the route with the minimum distance. path vector distance vector link state None of the choices are correct
distance vector
In ________, each node maintains a vector (table) of minimum distances to every node. path vector distance vector link state None of the choices are correct
distance vector
The Routing Information Protocol (RIP) is an intradomain routing based on _________ routing. distance vector link state path vector None of the choices are correct
distance vector
In ___________ routing algorithms, routes change as the network traffic loads or topology change.
dynamic
A graph G = (N, E) is a set N of nodes and a collection E of _______
edges