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WorksheetsNokia NRS I
Total questions: 90
Worksheet time: 56mins
When configuring a static route on router R2, what next hop address should be used to reach a host on 192.168.1.0/27?
10.1.1.1
10.1.1.2
10.2.3.2
10.2.3.3
What information is part of the encapsulation done at the
network interface layer?
source and destination mac address
source and destination port numbers
source and destination ip address
source and destination email address
Which of the following is the physical infrastructure that
provides interconnections between ISPs?
Demarcation
Central Office
Internet Exchange Point
Point of Presence
Which of the following is not a recommended usage
of the compact flashes on an Nokia 7750 SR?
Using CF1 to store debug logs
Using CF3 to store accounting logs
Using CF2 to store debug logs
Using CF3 to store system files
Which of the following provides physical separation
between service provider and customer responsibilities?
Provider edge router
Demarcation Point
Internet Exchange Point
Point of Presence
Which TCP/IP layer is responsible for path determination
and end-to-end forwarding of datagrams?
Application
Transport
Internet
Network Interface
Which of the following shows a typical data packet flow
when egressing an Nokia 7750 SR?
SF/CPM->MDA->IOM->SFP
SF/CPM -> IOM -> MDA -> SFP
Using CF 2 to store debug logs.
Using CF 3 to store system files.
Which of the following displays a hierarchical CLI command
structure at the current context level?
show
tree
info
help
Which of the following is NOT a valid log destination in
an Nokia 7750 SR?
Main
Syslog
Session
Console
Which one of the following log-IDs is typically reserved
for Network Management on an Nokia 7750 SR
0
99
98
100
Which of the following is NOT a type of Layer 2 network?
Point-to-point network
Virtual private routed network
Circuit-based network
Shared network
Which of the following is the physical infrastructure that
provides interconnections between ISPs?
Demarcation point
Internet Exchange Point
Central Office
Point of Presence
Which of the following statements about SONET/SDH is
FALSE?
SONET/SDH is a Layer-1 technology.
SDH is used primarily in North America.
The basic SONET frame is the STS-1.
An STS-1 frame is exactly one third of an STM-1 frame.
Which Ethernet frame field is found in the Ethernet
II frame header but NOT in the Ethernet 802.3 frame
header?
Preamble
Start Frame Delimiter
Source address
Type
Which address type is used to send frames to all devices
in a Local Area Network?
Anycast
Multicast
Broadcast
Unicast
Which of the following is NOT a characteristic of a hub?
It performs signal amplification.
It replicates Ethernet frames across all ports except
the receiving port.
It inspects Layer 2 frame headers.
It operates in half-duplex mode.
After all PCs in the below network have communicated
with each other, which interface will switch D populate in
its MAC FDB for PC1?
1/1/1
1/1/2
1/1/3
1/1/4
1/1/6
What 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?
The destination MAC address is saved in the MAC FDB,
and the frame is discarded.
The destination MAC address is saved in the MAC
FDB, and the frame is flooded to all ports except the
receiving port.
The source MAC address is saved in the MAC FDB, and
the frame is discarded.
The source MAC address is saved in the MAC FDB, and the
frame is flooded to all ports except the receiving port.
An Ethernet Local Area Network (LAN) consists of the
components shown in the diagram. How many broadcast
and collision domains are on this LAN?
2 broadcast domains, 7 collision domains
2 broadcast domains, 9 collision domains
3 broadcast domains, 7 collision domains
3 broadcast domains, 9 collision domains
7 broadcast domains, 9 collision domains
Which of the following statements about LAG is FALSE?
It aggregates physical links between devices.
It improves performance by increasing bandwidth between devices
It provides point-to-point redundancy between
devices.
It supports auto-negotiation on ports in the LAG.
Which of the following protocols is used to prevent loops
in Ethernet networks?
LAG
STP
ARP
ICMP
An 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?
The switch will flood the frames on ports 1 to 4
The switch will flood the frames on ports 2 to 4
The switch will flood the frames on ports 5 to 8
The switch will flood the frames on ports 2 to 8
Which of the following statements about VLAN stacking is
FALSE?
It allows a service provider to support customers that
use overlapping VLAN IDs.
It increases the number of VLANs a service provider
can support.
It increases the size of the VLAN ID field in the
Ethernet header.
It allows a service provider to add another VLAN tag to
traffic.
Which of the following is used to connect multiple
broadcast domains?
Hub
Switch
Router
Repeater
Which of the following IP header fields is used to
distinguish IPv4 from IPv6 traffic?
Type of Service
Version
Identification
Protocol
Which of the following is NOT a Regional Internet Registry?
ARIN
IANA
RIPE NCC
AfriNIC
Which of the following is a unicast address that is
assigned to two or more devices on the same network?
Network
Broadcast
Anycast
Multicast
Which of the following about hierarchical IPv4 addressing
is FALSE?
It cre ates a two-level address hierarchy.
It increases the number of IP addresses available in
the Internet.
It supports route summarization to reduce routing
table size.
It supports subnetting to divide a network into smaller
networks.
A 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 subnet network must have at least 25 hosts?
4
8
16
32
Which of the following is the broadcast address of the
network to which host 172.16.176.135/18 belongs?
172.16.176.255
172.16.191.255
172.16.255.255
172.255.255.255
How many subnets can be created from network
138.120.140.0/22 if each subnet must support 126 hosts?
4
8
16
32
Which of the following statements about a system IP
address on an Nokia 7750 SR is FALSE?
It is a loopback address.
It has a fixed prefix value of /32.
It is manually configured by an operator.
It is associated with the management port.
Which of the following is a characteristic of route
aggregation?
It summarizes subnet addresses into classful
addresses.
It maps multiple private IP addresses into one public
IP address.
It divides a network into multiple subnets.
It reduces the number of route advertisements
within a network.
What is the most specific aggregate prefix for the
following 3 subnets?
134.234.123.0/25
134.234.123.0/24
134.234.123.128/24
134.234.122.0/23
Which of the following is NOT part of the IP forwarding
process?
Perform longest match lookup for the destination
IP address.
Perform MAC address learning.
Push traffic through the switch fabric.
Identify physical egress interface.
Which DHCP message is used by a client to inform a
DHCP server that it accepts the assigned IP address?
Discover
Request
OFfer
Acknowledgement
What type of message is an ARP response?
Unicast message
Broadcast message
Anycast message
Multicast message
Which of the following statements about ICMP is TRUE?
ICMP is used to resolve a MAC address for a given IP
address.
ICMP messages are generated by Ethernet switches.
ICMP messages are encapsulated within IP datagrams.
ICMP relies on the CSMA/CD algorithm.
Which of the following about the routing table on an
Nokia 7750 SR is FALSE?
The routing table is maintained by the CPM.
The routing table contains next-hop information.
The routing table is used in the MPLS data plane.
The routing table is used to construct a forwarding
table.
Which of the following protocols is NOT used to build a
routing table?
LPD
OSPF
BGP
Static Routing
Router R5 receives four route updates for the same
prefix. Which of the four routes will be installed in R5's
routing table?
Routes learned from R1
Routes learned from R2
Routes learned from R3
Routes learned from R4
Router R5 receives four route updates for the same
prefix. Which of the four routes will be installed in R5's
routing table?
Routes learned from R1
Routes learned from R2
Routes learned from R3
Routes learned from R4
Which of the following about a static route in an Nokia
7750 SR is FALSE?
It is manually configured by an administrator
It is preferred over dynamic protocols by default
It changes dynamically if the topology changes
It can be used for routing within the same
autonomous system
Which of the following about an IP filter in an Nokia 7750
SR is FALSE?
It is also known as an Access Control List (ACL).
It is applied to all interfaces by default.
It can be used to filter traffic based on IP addresses.
It can be applied to egress traffic.
Which of the following about the displayed IP filter on
an Nokia 7750 SR is TRUE?
It discards traffic from network 1.2.3.0/24.
It discards traffic to network 1.2.3.0/24.
It discards all traffic except the traffic from network
1.2.3.0/24.
It discards all traffic except the traffic to network
1.2.3.0/24.
Which of the following about a router running a link state
routing protocol is FALSE?
It uses an SPF algorithm to calculate the routing table.
Route updates are driven by topology changes.
It sends copies of the routing table to neighbor
routers.
It has a view of the entire network topology.
Which routing protocol uses hop count for path
selection?
OSPF
IS-IS
RIPv2
BGP
Which of the following about the OSPF routing protocol
is TRUE?
It is a distance vector protocl.
It uses hop count to determine metric value.
It uses SPF algorithm for route selection.
It is used for routing between different autonomous
sytems.
Which of the following is used by OSPF to identify the
most up-to-date routing information?
Priority value in the Hello packet.
Age in the Link State Advertisement.
Master/slave status in the Database Description
packet.
Sequence number in the Link State Advertisement
Which of the following about BGP is FALSE?
It is a link state Protocol
It uses TCP sessions to establish BGP peering.
It can be used for routing within an autonomous
sytem.
It can be used for routing between autonomous
sytems.
Which of the following about autonomous systems is FALSE?
AS numbers can be assigned by RIRs.
AS numbers can be assigned by ISPs.
Private AS numbers are advertised on the Internet.
eBGP is used between different autonomous systems.
Which of the following is TRUE about a CE router that is
involved in a VPN service?
is aware of the VPN services provided by the service
provider.
It resides on the service provider premises.
It connects to at least one PE router.
It connects to at least one CE router.
What is the function of a SAP?
It provides a P device with service access.
It provides a CE device with service access.
It binds the service to an MPLS service tunnel.
It binds the service to an MPLS transport tunnel.
Which of the following about the service label is FALSE?
The ingress PE device encapsulates customer data
with a service label.
A service label identifies the service that data
belongs to.
The egress PE device strips the service labels and
forwards unlabeled packets.
A P device performs a service label swap operation.
Which device adds MPLS labels to packets that enter
a service provider network?
CE
P
ILER
eLER
Which device is the termination point of a Label Switched
Path (LSP)?
ce
p
iLER
eLER
What operation is performed by an iLER when it receives
a packet?
It pushes a new MPLS label and forwards the packet
to the next LSR.
It swaps the MPLS albel and forwards the packet to
the next LSR.
It forwards the packet to the next LSR without altering
the MPLS label.
It pops the MPLS label and forwards the packet to
the next IP router.
Which of the following devices performs a label swap
operation?
LSR
iLER
eLER
CE
Which of the following about VPWS is FALSE?
VPWS is a Layer 2 service.
VPWS emulates a single leased line between two
locations.
Each VPWS maintains a MAC FDB.
VPWS customers do not have knowledge of the service provider network.
Which of the following about VPLS is FALSE?
VPLS is a Layer 2 service.
VPLS emulates a switched Ethernet service.
VPLS customers don't have knowledge of the service
provider network.
Each PE maintains a VRF instance for each VPLS.
What are the four layers of technology used in the TCP/IP protocol suite?
Application
Transport
Network
Internet
Link Layer
Match the following
Powerful core IP/MPLS routing platform supports GE,10GE,40GE, 100GE, 400GE and 1T interfaces. Offers up to 96Tb/s capacity.
7950 XRS
Used for Access and Aggregatoin. Includes multiservice interfaces delivering Ethernet, TDM, ATM, Frame Relay, HDLC, and GPON
7705 SAR
Optimized for IP mobile transport, fixed-mobile convergence and datacenters. Well-suited for terabit-scale routing
7250 IXR
Powerful edge IP/MPLS routing platform supports GE, 10Ge, 40GE, 100GE and 400GE interfaces. Offers between 200 Gb/s and 288 Tb/s capacity.
7750 SR
Used for access, demarcation and cost-effective GE aggregation
7210 SAS
What are the main functions of the control plane?
Support management functions
Build the Forwarding Table
Transmit User application traffic
Handle Routing protocols messaging
Select the log source that stores events not associated with any other event category (a)
Select the log source that stores events generated due to debug commands. (a)
How many default logs are there?
1
2
3
4
Match the following
Contains all severity levels of events from the source main
Log ID 99
Typically reserved for SNMP mangement
Log ID 98
Pre-configured with NETCONF as the destination
Log ID 101
Contains events with severity levels of major or critical from the source main
Log ID 100
TiMOS-m.n.Yz contains the software image named
according to the (a) . (b) . (c) (d)
What does the bof.cfg NOT include?
management address
management port setting
image and configuration files
port configuration
What types of mangement datastores does the Nokia 7750 SR have?
Configuration
Security
System
State
Match the following
both CLI engines are authorized, classic CLI is only allowed to read
Model-driven Mode
both CLI engines are authorized, either CLI engine can modify
Mixed Mod
Only the classic CLI engine is authorized
Classic Mode
What are the different configuration edit modes in MD-CLI
Global
Exclusive
Admin
Private
Read-Only
Which edit modes give you access to the global candidate configuration
read-only
exclusive
private
global
What is FALSE about the differences between implicitly and explicitly editing?
A user in implicit mode can move to a context outside the "configuration" branch
A user in explicit mode must issue the quit-config command to exit configuration edit mode
Both options allow users to move freely between contexts that have the "configure" command as its root
A user in explicit mode can move to a context outside the "configuration" branch
T/F With the configuration configure lag <lag-id> port-threshold value <threshold value> action down, if the number of available links is less than or equal to the threshold value, the LAG is declared operationally down until the number of available links is greater than the threshold value.
True
False
T/F The cost of a LAG affects IGP and EGP cost.
True
False
What are the functions of the Link Layer?
establish a path between devices
Encapsulation of upper-layer data
unique addressing of physical interfaces
orderly access of devices to use the physical medium
What are the characteristics of Ethernet?
allow collision-free transmission on point-to-point interfaces
uses MAC addresses to identify devices on the networks
all of the above
uses a frame format including source and destination MAC address, type, upper-layer payload and frame check sequence
What is CSMA/CD?
Carrier sense multi access with carrier duplex
Carrier sense media access with collision detection
Carrier sense multiple access with collision detection
Carrier sense mac address with collision deterrent
When an Ethernet switch receives a packet what is added to the FDB?
destination port
src mac
src port
dest mac
src and destion mac address and src and dest port
What are the advantage of using VLANs in an Ethernet network?
To decrease the amount of broadcast traffic and decrease network security
To increase the amount of broadcast traffic and increase network administration
To decrease the amount of broadcast traffic and increase network security
To decrease the amount of broadcast traffic and decrease network administration
What is the limit for the number of VLANs supported by a switch?
(a)
How many bits does an IPv4 address have?
(a)
Which characteristic of a distance vector protocol is FALSE?
Frequent Periodic updates (slow convergence)
Views the network topology from the neighbor's perspective
Passes copies of routing table to neighboring routers
The path with the highest hop count is the best path
Two OSPF routers do not have matching MTU configurations. Which adjacency state will these routers be in?
(a)
Match the following
L2 point-to-point service
VPWS
L2 multipoint service
VPLS
VPRN
L3 multipoint service
Which service componet on the PE router provides customer access to the service?
SPD
CE
SAP
Tunnel
What type of transport tunnels are typically used to forward customer packets across the provider network?
(a)
Select the labels that are added to the customer data at the ingress PE router to support a VPN service?
data
headers
service label
transport label
Which VPN service maintains a MAC FDB?
VPN
MPLS
VPLS
VPRN
