4A0-100 Exam Questions
388 real 4A0-100 exam questions with expert-verified answers and explanations. Page 2 of 8.
- Question #51IP Network Fundamentals
Which of the following IP header fields contains information that indicates whether routers are allowed to fragment a packet?
IP header fieldsfragmentation flagsDF bitIP datagram - Question #52IP Network Fundamentals
What is the main purpose of IP fragmentation?
IP fragmentationMTULayer 2 networksdatagram size - Question #53Service Fundamentals
Which of the following is a characteristic of Port Address Translation?
PATNATaddress translationport address translation - Question #54Service Fundamentals
Which of the following describes an IP filter on the Alcatel-Lucent 7750 SR?
IP filterpacket filteringaccess controlAlcatel-Lucent 7750 - Question #55Service Fundamentals
Which of the following command lines would be found in a list of commands designed to permit only certain type of traffic from exiting router RTR-A to router RTR-B?
IP filteregress filterfilter configurationtraffic policy - Question #56IP Network Fundamentals
What is the sequence of messages sent by a host when it attempts to ping a destination for which it has no Address Resolution Protocol (ARP) cache entry?
ARPICMPping sequenceARP cache miss - Question #57Data Link Protocols
Which of the following best describes the function of an ARP cache within the same subnet?
ARP cacheMAC address resolutionIP to MAC mappingARP - Question #58Service Fundamentals
What is the sequence of events for a client to receive an IP address from the server in the DHCP?
DHCPDORA sequenceIP address assignmentDHCP messages - Question #59IP Network Fundamentals
Which of the following statements is TRUE about ICMP?
ICMPIP encapsulationerror reportingICMP messages - Question #60IP Network Fundamentals
What protocol is used by ping to verify IP network reachability?
pingICMPecho requestnetwork reachability - Question #61IP Network Fundamentals
When a device in an IP network receives an echo request message that is destined for itself, it then:
ICMPecho requestecho replyping - Question #62IP Network Fundamentals
What ICMP message type will a router use to indicate to a host that an IP datagram sourced from that host cannot be delivered?
ICMPdestination unreachableerror messagesICMP types - Question #63Routing Fundamentals
A set of tasks that move a packet from its entry into an IP network to itsexit from the IP network. Thisdescribes:
IP routingpacket forwardingnetwork definition - Question #64Routing Fundamentals
Which field in the IP routing table contains the name or address of the neighbour that advertised the prefix to the router?
routing tablenext hoproute advertisementprefix - Question #65Routing Fundamentals
What is the function of the Routing Table Manager?
routing table managerRTMroute preferencebest route selection - Question #66Routing Fundamentals
Which of the following is characteristic of a static route?
static routenext hopmanual configuration - Question #67Routing Fundamentals
Which of the following describes a static default route?
default routestatic routewildcard routerouting table - Question #68Routing Fundamentals
Based on the network diagram (click on the exhibit), what is the command to use on R1 to setup a static route to the network on CR1
static routeCLI configurationnext hopprefix notation - Question #69Routing Fundamentals
Based on the network diagram, (click on exhibit) what is the command to use on CR1 to setup a default static route to R1?
default static routeCLI configuration0.0.0.0/0next hop - Question #70Routing Fundamentals
Based on the network diagram (click on exhibit), R2 wants to connect to the networks behind CR1 using a static-route. What is the correct syntax given the choices below? R1 has a v...
static routemulti-hop routingnext hop selectionindirect route - Question #71Routing Fundamentals
Based on the network diagram (click on exhibit), Router 1 installs the network D in its routing table, based on a dynamic routing update from Router 2. Which of the following descr...
dynamic routingrouting tablenext hoproute installation - Question #72Routing Fundamentals
What are the tasks of the Routing Table Manager (RTM)? Choose two
routing table managerRTMroute selectionroute installation - Question #73Routing Fundamentals
What are some of the characteristics of BGP? Choose three
BGPexterior gateway protocolautonomous systemdistance vector - Question #74Routing Fundamentals
Which is the public AS in the diagram?
BGPautonomous system numberpublic ASprivate AS - Question #75Routing Fundamentals
In the diagram, what type of BGP session is established between the routers of AS 2002?
BGPIBGPautonomous systemBGP sessions - Question #76Routing Fundamentals
In the diagram, what type of BGP session is established between the routers of AS 65001 and AS 2002?
BGPEBGPinter-AS routingBGP sessions - Question #77Service Fundamentals
Which of the following statements describes the purpose of the Transport Layer in the TCP/IP stack?
transport layerTCP/IP stackOSI modellayer functions - Question #78Service Fundamentals
Which of the following is NOT a function of TCP?
TCPtransport layerrouting separationTCP functions - Question #79Service Fundamentals
What must occur before two hosts can exchange data using TCP?
TCP3-way handshakeconnection establishment - Question #80Service Fundamentals
Host A is transmitting data to host B on a TCP connection. What is the purpose of the ACK sent by host B?
TCPACKsequence numberacknowledgment - Question #81Service Fundamentals
Host A receives a TCP SYN/ACK segment. What does this signify?
TCP handshakeSYN/ACKconnection establishmentthree-way handshake - Question #82Service Fundamentals
What is the purpose of the source and destination ports in the TCP header?
TCP portsapplication identificationtransport layer addressingport numbers - Question #83Service Fundamentals
Which of the following is NOT a field in a TCP header?
TCP header fieldsMTUsequence numberwindow size - Question #84Service Fundamentals
Which of the following fields is not a field in the TCP header used for the establishment and termination of a TCP connection?
TCP header fieldsSYN flagACK flagFIN flag - Question #85Service Fundamentals
The sequence numbers are used by TCP to ensure that the data receive is provided to the application in the correct order.
TCP sequence numbersordered deliveryreliabilityTCP fundamentals - Question #86Service Fundamentals
What happens in a TCP session if a segment is not acknowledged within a certain time period?
TCP retransmissionacknowledgment timeoutreliabilitysegment loss - Question #87Service Fundamentals
What is the purpose of TCP flow control?
TCP flow controlwindow sizereceiver buffercongestion control - Question #88Service Fundamentals
Which field in the TCP header is used by the receiver to indicate how many segments it can receive?
TCP window sizeflow controlTCP header fieldsreceiver capacity - Question #89Service Fundamentals
What must the sender do when it receives a window size of 0 from the receiver?
TCP flow controlzero windowsender behaviorwindow size - Question #90Service Fundamentals
Which of the following statements BEST describes the purpose of UDP (Select two)?
UDPconnectionless deliveryunreliable transmissiontransport protocols - Question #91Service Fundamentals
Why does UDP have less overhead than TCP?
UDP overheadTCP vs UDPacknowledgmentretransmission - Question #92Service Fundamentals
Which application below would be likely to use UDP?
UDP applicationsVoIPreal-time audioprotocol selection - Question #93Service Fundamentals
How does the Transport Layer identify which application is to receive the data?
port numberstransport layerapplication multiplexingdemultiplexing - Question #94Service Fundamentals
What capability of TCP/IP allows two hosts to have multiple TCP sessions to each other simultaneously?
TCP socketfive-tuplesession multiplexingconcurrent sessions - Question #95Service Fundamentals
What operation is performed by an LSR when it receives an MPLS labeled packet?
MPLSLSRlabel swappinglabel forwarding - Question #96Service Fundamentals
What is the function of an LSR?
MPLSLSR functionlabel-based forwardingMPLS architecture - Question #97Service Fundamentals
In an MPLS network, which device is responsible for taking an unlabeled packet and encapsulating it with an MPLS label?
MPLSingress LERlabel impositionlabel edge router - Question #98Service Fundamentals
Which of the following are correct statements about MPLS labels (Choose three)?
MPLS labelsLSPlabel significancedynamic signaling - Question #99Service Fundamentals
Which device is responsible for removing the MPLS label before the packet reaches the CE device?
MPLSegress LERlabel removallabel disposition - Question #100Service Fundamentals
Which two protocols are used for the dynamic signaling of MPLS labels (Choose two)?
MPLS signalingLDPRSVP-TEdynamic label distribution