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Perguntas do quiz (50)
1Which two options are causes of out-of-order packets? (Choose two.)
- Aa routing loop
- Ba router in the packet flow path that is intermittently dropping packets
- Chigh latency
- Dpackets in a flow traversing multiple paths through the network
- Esome packets in a flow being process-switched and others being interrupt-switched on a transit
router
2A TCP/IP host is able to transmit small amounts of data (typically less than 1500 bytes), but
attempts to transmit larger amounts of data hang and then time out. What is the cause of this
problem?- AA link is flapping between two intermediate devices.
- BThe processor of an intermediate router is averaging 90 percent utilization.
- CA port on the switch that is connected to the TCP/IP host is duplicating traffic and sending it to a port that has a sniffer attached.
- DThere is a PMTUD failure in the network path
3ICMP Echo requests from host A are not reaching the intended destination on host B. What is the
problem?
- AThe ICMP payload is malformed.
- BThe ICMP Identifier (BE) is invalid.
- CThe negotiation of the connection failed.
- DThe packet is dropped at the next hop.
- EThe link is congested.
4Which statement is true?
- AIt is impossible for the destination interface to equal the source interface.
- BNAT on a stick is performed on interface Et0/0.
- CThere is a potential routing loop
- DThis output represents a UDP flow or a TCP flow.
5Which three conditions can cause excessive unicast flooding? (Choose three.)
- AAsymmetric routing
- BRepeated TCNs
- CThe use of HSRP
- DFrames sent to FFFF.FFFF.FFFF
- EMAC forwarding table overflow
- FThe use of Unicast Reverse Path Forwarding
6Which congestion-avoidance or congestion-management technique can cause global
synchronization?- ATail drop
- BRandom early detection
- CWeighted random early detection
- DWeighted fair queuing
7Which two options are reasons for TCP starvation? (Choose two.)
- AThe use of tail drop
- BThe use of WRED
- CMixing TCP and UDP traffic in the same traffic class
- DThe use of TCP congestion control
8While troubleshooting high CPU utilization of a Cisco Catalyst 4500 Series Switch, you notice the
error message that is shown in the exhibit in the log file.
"L3 routing table is full. switching to software forwarding"
What can be the cause of this issue, and how can it be prevented?- AThe hardware routing table is full. Redistribute from BGP into IGP.
- BThe software routing table is full. Redistribute from BGP into IGP.
- CThe hardware routing table is full. Reduce the number of routes in the routing table.
- DThe software routing table is full. Reduce the number of routes in the routing table.
9Which two are causes of output queue drops on FastEthernet0/0? (Choose two.)
- Aan oversubscribed input service policy on FastEthernet0/0
- Ba duplex mismatch on FastEthernet0/0
- Ca bad cable connected to FastEthernet0/0
- Dan oversubscribed output service policy on FastEthernet0/0
- EThe router trying to send more than 100 Mb/s out of FastEthernet0/0
10Which statement about the output is true?
- AThe flow is an HTTPS connection to the router, which is initiated by 144.254.10.206.
- BThe flow is an HTTP connection to the router, which is initiated by 144.254.10.206.
- CThe flow is an HTTPS connection that is initiated by the router and that goes to
144.254.10.206. - DThe flow is an HTTP connection that is initiated by the router and that goes to 144.254.10.206
11What is the cause of ignores and overruns on an interface, when the overall traffic rate of the
interface is low?- Aa hardware failure of the interface
- Ba software bug
- Ca bad cable
- Dmicrobursts of traffic
12Which statement about the debug behavior of the device is true?
- AThe device debugs all IP events for 172.16.129.4
- BThe device sends all debugging information for 172.16.129.4
- CThe device sends only NTP debugging information to 172.16.129.4
- DThe device sends debugging information every five seconds
13Which statement about MSS is true?
- AIt is negotiated between sender and receiver.
- BIt is sent in all TCP packets.
- CIt is 20 bytes lower than MTU by default
- DIt is sent in SYN packets.
- EIt is 28 bytes lower than MTU by default.
Answer: D
14Which two methods change the IP MTU value for an interface?
- AConfigure the default MTU
- BConfigure the IP system MTU.
- CConfigure the interface MTU.
- DConfigure the interface IP MTU.
15Which implementation can cause packet loss when the network includes asymmetric routing
paths?- Athe use of ECMP routing
- Bthe use of penultimate hop popping
- Cthe use of Unicast RPF
- Ddisabling Cisco Express Forwarding
16Which two mechanisms can be used to eliminate Cisco Express Forwarding polarization?
- Aalternating cost links
- Bthe unique-ID/universal-ID algorithm
- CCisco Express Forwarding antipolarization
- Ddifferent hashing inputs at each layer of the network
17Which two mechanisms provide Cisco IOS XE Software with control plane and data plane
separation? (Choose two.)- AForwarding and Feature Manager
- BForwarding Engine Driver
- CForwarding Performance Management
- DForwarding Information Base
18What is the PHB class on this flow?
- AEF
- Bnone
- CAF21
- DCS4
19What kind of load balancing is done on this router?
- Aper-packet load balancing
- Bper-flow load balancing
- Cper-label load balancing
- Dstar round-robin load balancing
20What is the most efficient way to confirm whether microbursts of traffic are occurring?
- AMonitor the output traffic rate using the show interface command.
- BMonitor the output traffic rate using the show controllers command.
- CCheck the CPU utilization of the router.
- DSniff the traffic and plot the packet rate over time.
21What is a cause for unicast flooding?
- AUnicast flooding occurs when multicast traffic arrives on a Layer 2 switch that has directly connected multicast receivers
- BWhen PIM snooping is not enabled, unicast flooding occurs on the switch that interconnects the PIM-enabled routers.
- CA man-in-the-middle attack can cause the ARP cache of an end host to have the wrong MAC
address. Instead of having the MAC address of the default gateway, it has a MAC address of the
man-in-the-middle. This causes all traffic to be unicast flooded through the man-in-the-middle,
which can then sniff all packets. - DForwarding table overflow prevents new MAC addresses from being learned, and packets
destined to those MAC addresses are flooded until space becomes available in the forwarding
table.
22Video Source S is sending interactive video traffic to Video Receiver R. Router R1 has multiple
routing table entries for destination R. Which load-balancing mechanism on R1 can cause out-oforder
video traffic to be received by destination R?
- Aper-flow load balancing on R1 for destination R
- Bper-source-destination pair load balancing on R1 for destination R
- CCEF load balancing on R1 for destination R
- Dper-packet load balancing on R1 for destination R
23What is Nagle's algorithm used for?
- ATo increase the latency
- BTo calculate the best path in distance vector routing protocols
- CTo calculate the best path in link state routing protocols
- DTo resolve issues caused by poorly implemented TCP flow control
24Which statement is true regarding the UDP checksum?
- AIt is used for congestion control.
- BIt cannot be all zeros.
- CIt is used by some Internet worms to hide their propagation.
- DIt is computed based on the IP pseudo-header.
25Which statement describes the purpose of the Payload Type field in the RTP header?
- AIt identifies the signaling protocol.
- BIt identifies the codec.
- CIt identifies the port numbers for RTP
- DIt identifies the port numbers for RTCP.
26Which Cisco IOS XE process administers routing and forwarding?
- AForwarding manager
- BInterface manager
- CCisco IOS
- DHost manager
27Which circumstance can cause packet loss due to a microburst?
- Aslow convergence
- Ba blocked spanning-tree port
- Cprocess switching
- Dinsufficient buffers
28Which two statements about proxy ARP are true? (Choose two.)
- AIt is supported on networks without ARP.
- BIt allows machines to spoof packets.
- CIt requires larger ARP tables.
- DIt reduces the amount of ARP traffic.
29Routers R1 and R2 are configured as shown, and traffic from R1 fails to reach host
209.165.201.254.
- AEnsure that R2 has a default route in its routing table
- BChange the OSPF area type on R1 and R2
- CEdit the router configurations so that address 209.165.201.254 is a routable address.
- DRemove the default-information originate command from the OSPF configuration of R2.
30Which service is disabled by the no service tcp-small-servers command?
- Athe finger service
- Bthe Telnet service
- Cthe Maintenance Operation Protocol service
- Dthe chargen service
31select right order of column one for placing in column two
- A4-1-3-2
- B2-4-1-3
- C4-3-1-2
- D3-1-4-2
32select right order of column one for placing in column two
- A3-4-5-2-1
- B3-1-4-5-2
- C4-1-5-2-3
- D3-4-1-5-2
33Which two Cisco Express Forwarding tables are located in the data plane? (Choose two.)
- Athe forwarding information base
- Bthe label forwarding information base
- Cthe IP routing table
- Dthe label information table
34Which option is the most effective action to avoid packet loss due to microbursts?
- AImplement larger buffers.
- BInstall a faster CPU.
- CInstall a faster network interface.
- DConfigure a larger tx-ring size
35Which two statements about packet fragmentation on an IPv6 network are true? (Choose two.)
- AThe fragment header is 64 bits long.
- BThe identification field is 32 bits long
- CThe fragment header is 48 bits long.
- DThe identification field is 64 bits long.
- EThe MTU must be a minimum of 1280 bytes
36You are backing up a server with a 1 Gbps link and a latency of 2 ms. Which two statements about
the backup are true? (Choose two.)- AThe bandwidth delay product is 2 Mb.
- BThe default TCP send window size is the limiting factor.
- CThe default TCP receive window size is the limiting factor.
- DThe bandwidth delay product is 500 Mb.
- EThe bandwidth delay product is 50 Mb.
37Which two pieces of information does RTCP use to inform endpoint devices about the RTP flow?
- Athe transmitted octet
- Bthe lost packet count
- Csession control function provisioning information
- Dthe CNAME for session participants
- Ethe authentication method
- FMTU size changes in the path of the flow
38Drag and drop the argument of the ip cef load-sharing algorithm command on the left to the
function it performs on the right.
- A2-3-4-1
39Drag and drop the Cisco IOX XE subpackage on the left to the function it performs on the right.
- A1-2-4-3
- B1-3-4-2
40Drag and drop each description of IPv6 transition technology on the left to the matching IPv6
transition technology category on the right.
- A45-16-23
41How many hash buckets does Cisco Express Forwarding use for load balancing?
- A8
- B16
- C24
- D32
42Which three features require Cisco Express Forwarding? (Choose three.)
- ANBAR
- BAutoQoS
- Cfragmentation
- DMPLS
- EUplinkFast
- FBackboneFast
43Which two options are interface requirements for turbo flooding? (Choose two.)
- AThe interface is Ethernet.
- BThe interface is configured for ARPA encapsulation
- CThe interface is PPP.
- DThe interface is configured for GRE encapsulation.
- EThe interface is configured for 802.1Q encapsulation
44Which three options are sub-subfields of the IPv4 Option Type subfield? (Choose three.)
- AOption Class
- BGET
- CCopied
- DPUSH
- EOption Number
- FTTL
45Which TCP mechanism prevents the sender from sending data too quickly for the receiver to
process?- ACongestion control
- BError detection
- CSelective acknowledgement
- DFlow control
46Which two packet types does an RTP session consist of?
- ATCP
- BRTCP
- CRTP
- DICMP
- EBOOTP
- FARP
47Which technology can create a filter for an embedded packet capture?
- AControl plane policing
- BAccess lists
- CNBAR
- DTraffic shaping
48Which option describes a limitation of Embedded Packet Capture?
- AIt can capture data only on physical interfaces and subinterfaces
- BIt can store only packet data.
- CIt can capture multicast packets only on ingress.
- DIt can capture multicast packets only on egress.
49A Cisco Catalyst 6500 Series Switch experiences high CPU utilization. What can be the cause of
this issue, and how can it be prevented?
- AThe hardware routing table is full. Redistribute from BGP into IGP
- BThe software routing table is full. Redistribute from BGP into IGP
- CThe hardware routing table is full. Reduce the number of routes in the routing table.
- DThe software routing table is full. Reduce the number of routes in the routing table.
50Your network is suffering excessive output drops. Which two actions can you take to resolve the
problem? (Choose two.)
- AInstall a switch with larger buffers.
- BConfigure a different queue set.
- CReconfigure the switch buffers.
- DConfigure the server application to use TCP.
- EUpdate the server operating system.
Informações
- Descrição
- rsq
- Autor
- ashwin.amrita
- Idioma
- English
- Visualizações
- 11
- Avaliação
- Ainda sem avaliações Avalie este quiz