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NRS-1 Questions
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Preguntas del test (60)
1Which of the following is the physical infrastructure that provides interconnections between ISPs?
- Ademarcation point
- BAn Internet exchange point
- CA central office
- DA point of presence
2Which of the following provides physical separation between service provider and customer responsibilities?
- AA provider edge router
- BAn Internet exchange point
- CA demarcation point
- DA point of presence
3Which TCP/IP layer is responsible for path determination and end-to-end forwarding of datagrams?
- AThe application services layer
- BThe transport layer
- CThe Internet protocol layer
- DThe network interface layer
4What information is part of the encapsulation done at the network interface layer?
- ASource and destination MAC addresses
- BSource and destination IP addresses
- CSource and destination port numbers
- DSource and destination email addresses
5Which of the following shows a typical data packet flow when egressing an Nokia 7750 SR?
- ASF/CPM -> MDA -> IOM -> SFP
- BSF/CPM -> SFP -> IOM -> MDA
- CSF/CPM -> IOM -> MDA -> SFP
- DMDA -> IOM -> SF/CPM -> SFP
6Which of the following is not a recommended usage of the compact flashes on an Nokia 7750 SR?
- AUsing CF 1 to store debug logs.
- BUsing CF 2 to store debug logs.
- CUsing CF 3 to store accounting logs.
- DUsing CF 3 to store system files.
7Which of the following displays a hierarchial CLI command structure at the current context level?
- Ashow
- Binfo
- Ctree
- Dhelp
8Which of the following is NOT a valid log destination in an Nokia 7750 SR?
- AMain
- BSession
- CSyslog
- DConsole
9Which one of the following log-IDs is typically reserved for Network Management on an Nokia 7750 SR
- A0
- B98
- C99
- D100
10Which of the following is NOT a type of Layer 2 network?
- APoint-to-point network
- BCircuit-based network
- CVirtual private routed network
- DShared network
11Which of the following statements about SONET/SDH is FALSE?
- ASONET/SDH is a Layer-1 technology
- BSDH is used primarily in North America
- CThe basic SONET frame is the STS-1.
- DAn STS-1 frame is exactly one third of an STM-1 frame
12Which Ethernet frame field is found in the Ethernet II frame header but NOT in the Ethernet 802.3 frame header?
- APreamble
- BStart Frame Delimiter
- CSource address
- DType
13Which address type is used to send frames to all devices in a Local Area Network?
- AAnycast
- BMulticast
- CBroadcast
- DUnicast
14Which of the following is NOT a characteristic of a hub?
- AIt performs signal amplification.
- BIt replicates Ethernet frames across all ports except
the receiving port. - CIt inspects Layer 2 frame headers.
- DIt operates in half-duplex mode.
15After all PCs in the below network have communicated with each other, which interface will switch D populate in its MAC FDB for PC1?
- A1/1/1
- B1/1/2
- C1/1/3
- D1/1/4
- E1/1/6
16What happens when a switch receives an Ethernet frame with an unknown source MAC address and a destination MAC address of ff:ff:ff:ff:ff:ff?
- AThe destination MAC address is saved in the MAC FDB,
and the frame is discarded. - BThe destination MAC address is saved in the MAC
FDB, and the frame is flooded to all ports except the
receiving port. - CThe source MAC address is saved in the MAC FDB, and
the frame is discarded. - DThe source MAC address is saved in the MAC FDB, and the
frame is flooded to all ports except the receiving port.
- AThe destination MAC address is saved in the MAC FDB,
17An Ethernet Local Area Network (LAN) consists of the components shown in the diagram. How many broadcast and collision domains are on this LAN?
- A2 broadcast domains, 7 collision domains
- B2 broadcast domains, 9 collision domains
- C3 broadcast domains, 7 collision domains
- D3 broadcast domains, 9 collision domains
- E7 broadcast domains, 9 collision domains
18Which of the following statements about LAG is FALSE?
- AIt aggregates physical links between devices
- BIt provides point-to-point redundancy between
devices. - CIt supports auto-negotiation on ports in the LAG
- DIt improves performance by increasing bandwidth
between devices.
19Which of the following protocols is used to prevent loops in Ethernet networks?
- ALAG
- BSTP
- CARP
- DICMP
20An 8-port Ethernet switch is configured with VLAN 100 on ports 1-4, and VLAN 200 on ports 5-8. What happens when the switch receives a frame with an unknown destination address on port 1?
- AThe switch will flood the frames on ports 1 to 4.
- BThe switch will flood the frames on ports 2 to 4.
- CThe switch will flood the frames on ports 5 to 8.
- DThe switch will flood the frames on ports 2 to 8.
21Which of the following statements about VLAN stacking is FALSE?
- AIt allows a service provider to support customers that use overlapping VLAN IDs.
- BIt increases the number of VLANs a service provider can support.
- CIt increases the size of the VLAN ID field in the Ethernet header.
- DIt allows a service provider to add another VLAN tag to traffic.
22Which of the following is used to connect multiple broadcast domains?
- AHub
- BSwitch
- CRouter
- DRepeater
23Which of the following IP header fields is used to distinguish IPv4 from IPv6 traffic?
- AType of Service
- BVersion
- CIdentification
- DProtocol
24Which of the following is NOT a Regional Internet Registry?
- AARIN
- BIANA
- CRIPE NCC
- DAfriNIC
25Which of the following is a unicast address that is assigned to two or more devices on the same network?
- ANetwork address
- BBroadcast address
- CMulticast address
- DAnycast address
26Which of the following about hierarchical IPv4 addressing is FALSE?
- AIt creates a two-level address hierarchy.
- BIt increases the number of IP addresses available in
the Internet. - CIt supports route summarization to reduce routing
table size. - DIt supports subnetting to divide a network into smaller
networks.
27A network has an address of 206.47.132.0 and a network mask of 255.255.254.0. How many subnetworks can be created if each subnetnetwork must have at least 25 hosts?
- A4
- B8
- C16
- D32
28Which of the following is the broadcast address of the network to which host 172.16.176.135/18 belongs?
- A172.16.176.255
- B172.16.191.255
- C172.16.255.255
- D172.255.255.255
29How many subnets can be created from network 138.120.140.0/22 if each subnet must support 126 hosts?
- A4
- B8
- C16
- D32
30Which of the following statements about a system IP address on an Nokia 7750 SR is FALSE?
- AIt is a loopback address.
- BIt has a fixed prefix value of /32.
- CIt is manually configured by an operator.
- DIt is associated with the management port.
31Which of the following is a characteristic of route aggregation?
- AIt summarizes subnet addresses into classful addresses.
- BIt maps multiple private IP addresses into one public
IP address. - CIt divides a network into multiple subnets.
- DIt reduces the number of route advertisements within a network.
32What is the most specific aggregate prefix for the following 3 subnets?
- A134.234.123.0/25
- B134.234.123.0/24
- C134.234.123.128/24
- D134.234.122.0/23
33Which of the following is NOT part of the IP forwarding process?
- APerform longest match lookup for the destination IP address.
- BPerform MAC address learning.
- CPush traffic through the switch fabric.
- DIdentify physical egress interface.
34Which DHCP message is used by a client to inform a DHCP server that it accepts the assigned IP address?
- ADiscover
- BRequest
- COffer
- DAcknowledgement
35What type of message is an ARP response?
- AA unicast message
- BA broadcast message
- CA multicast message
- DAn anycast message
36Which of the following statements about ICMP is TRUE?
- AICMP is used to resolve a MAC address for a given IP address.
- BICMP messages are generated by Ethernet switches.
- CICMP messages are encapsulated within IP datagrams.
- DICMP relies on the CSMA/CD algorithm
37Which of the following about the routing table on an Nokia 7750 SR is false?
- AThe routing table is maintained by the CPM
- BThe routing table contains next-hop information
- CThe routing table is used in the MPLS data plane
- DThe routing table is used to construct a forwarding table
38Which of the following protocols is NOT used to build a routing table?
- ALPD
- BOSPF
- CBGP
- DStatic Routing
39Router R5 receives four route updates for the same prefix. Which of the four routes will be installed in R5’s routing table?
- ARoutes learned from R1
- BRoutes learned from R2
- CRoutes learned from R3
- DRoutes learned from R4
40Router R5 receives four route updates for the same prefix. Which of the four routes will be installed in R5’s routing table?
- ARoute learned from router R1
- BRoute learned from router R2
- CRoute learned from router R3
- DRoute learned from router R4
41Which of the following about a static route in an Nokia 7750 SR is FALSE?
- AIt is manually configured by an administrator
- BIt is preferred over dynamic protocols by default
- CIt changes dynamically if the topology changes
- DIt can be used for routing within the same autonomous system
42When configuring a static route on router R2, what next hop address should be used to reach a host on 192.168.1.0/27?
- A10.1.1.1
- B10.1.1.2
- C10.2.3.2
- D10.2.3.3
43Which of the following about an IP filter in an Nokia 7750 SR is FALSE?
- AIt is also known as an Access Control List (ACL).
- BIt is applied to all interfaces by default.
- CIt can be used to filter traffic based on IP addresses.
- DIt can be applied to egress traffic.
44Which of the following about the displayed IP filter on an Nokia 7750 SR is TRUE?
- AIt discards traffic from network 1.2.3.0/24.
- BIt discards traffic to network 1.2.3.0/24.
- CIt discards all traffic except the traffic from network 1.2.3.0/24.
- DIt discards all traffic except the traffic to network 1.2.3.0/24.
45Which of the following about a router running a link state routing protocol is FALSE?
- AIt uses an SPF algorithm to calculate the routing table.
- BRoute updates are driven by topology changes.
- CIt sends copies of the routing table to neighbour routers.
- DIt has a view of the entire network topology
46Which routing protocol uses hop count for path selection?
- AOSPF
- BRIPv2
- CIS-IS
- DStatic Routing
47Which routing protocol is best used to provide routing between autonomous systems?
- AOSPF
- BIS-IS
- CRIPv2
- DBGP
48Which of the following about the OSPF routing protocol is TRUE?
- AIt is a distance vector protocol.
- BIt uses SPF algorithm for route selection.
- CIt uses hop count to determine metric value.
- DIt is used for routing between different autonomous sytems.
49Which of the following is used by OSPF to identify the most up-to-date routing information?
- APriority value in the Hello packet.
- BAge in the Link State Advertisement.
- CMaster/slave status in the Database Description packet.
- DSequence number in the Link State Advertisement
50Which of the following about BGP is FALSE?
- AIt is a link state protocol.
- BIt uses TCP sessions to establish BGP peering.
- CIt can be used for routing within an autonomous system.
- DIt can be used for routing between autonomous systems.
51Which of the following about autonomous systems is FALSE?
- AAS numbers can be assigned by RIRs.
- BAS numbers can be assigned by ISPs.
- CPrivate AS numbers are advertised on the Internet.
- DeBGP is used between different autonomous systems.
52Which of the following is TRUE about a CE router that is involved in a VPN service?
- AIt is aware of the VPN services provided by the service provider.
- BIt resides on the service provider premises.
- CIt connects to at least one PE router.
- DIt connects to at least one CE router.
53What is the function of a SAP?
- AIt provides a P device with service access.
- BIt provides a CE device with service access.
- CIt binds the service to an MPLS service tunnel.
- DIt binds the service to an MPLS transport tunnel.
54Which of the following about the service label is FALSE?
- AThe ingress PE device encapsulates customer data with a service label.
- BA service label identifies the service that data belongs to.
- CThe egress PE device strips the service labels and forwards unlabeled packets.
- DA P device performs a service label swap operation.
55Which device adds MPLS labels to packets that enter a service provider network?
- ACE
- BP
- CiLER
- DeLER
56Which of the following about VPWS is FALSE?
- AVPWS is a Layer 2 service.
- BVPWS emulates a single leased line between two locations.
- CEach VPWS maintains a MAC FDB.
- DVPWS customers do not have knowledge of the service provider network.
57Which of the following about VPLS is FALSE?
- AVPLS is a Layer 2 service.
- BVPLS emulates a switched Ethernet service.
- CVPLS customers don’t have knowledge of the service provider network.
- DEach PE maintains a VRF instance for each VPLS.
58Which device is the termination point of a Label Switched Path (LSP)?
- ACE
- BP
- CiLER
- DeLER
59What operation is performed by an iLER when it receives a packet?
- AIt pushes a new MPLS label and forwards the packet to the next LSR.
- BIt swaps the MPLS albel and forwards the packet to the next LSR.
- CIt forwards the packet to the next LSR without altering the MPLS label.
- DIt pops the MPLS label and forwards the packet to the next IP router.
60Which of the following devices performs a label swap operation?
- ALSR
- BiLER
- CeLER
- DCE
Información
- Descripción
- NRS-1 Nokia Exam Questions
- Autor
- ryan abbott
- Idioma
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