301-400 Flashcards
Which of the following statements regarding OSPF special areas is false?
A - A totally stub area allows the Type 3 default route advertised by an ABR, and does not allow AS
external routes and inter-area routes.
B - Different from a totally stub area, a stub area allows inter area routes.
C - Different from a stub area, a NSSA area allows importing AS external routes. An ABR advertises these
routes within its area using Type 7 LSA’s
D - Different from an NSSA area, a totally stub area does not allow inter-area routes.
C
In static LACP mode, the active interfaces selected by devices at both ends must be the same, otherwise, a
LAG cannot be set up. You can specify one end as active side. Then the other end selects active interfaces based on the Active side. So, in static LACP mode, how is the Active side be selected?
A - The end with a smaller LACP system priority functions as the Active side. If the two ends have the same LACP system priority, the end with a smaller MAC address functions as active side.
B - The end with a smaller MAC address is selected as the active side.
C - The end with a higher LACP system priority functions as the Active side. If the two ends have the same
LACP system priority, the end with larger MAC address functions as the active side.
D - The end with a lower LACP system priority functions as the Active side. If the two ends have the same
LACP system priority, the end with a smaller MAC address functions as the active side.
D
Which of the following configuration can enable indirectly connected EBGR peers to establish a connection normally? A - peer connect-interface B - peer ebgp-max-hop C - peer ignore D - peer as-number
B
Which of the following statements regarding network-summary-LSA are true? (multiple choice)
A - Link State ID in Network-Summary-LSA is set as the destination network IP address
B - Net mask in Network-Summary-LSA is set as the network mask of the destination network segment
C - Metric in Network-Summary-LSA is set the cost of a route from an ABR to a destination network
segment
D - Network-Summary-LSA is generated by an ASBR.
A B C
Which of the following are possible causes for an MSTP failure in a LAN?
A - MSTP is configured incorrectly
B - A physical link alternates between up and Down triggering the device to send a large number of TC
packets
C - The MSTP-enabled device receives MSTP TC packets that are transparently sent or from the client
D - The priority of the port in the specified MSTI is not configured
A B C
Which of the following hello packets are used in IS-IS? (Multiple Choice) A - Level-1 LAN IIH B - Level-2 LAN IIH C - Level-3 LAN IIH D - P2P LAN IIH
A B D
RSTP provides faster convergence than STP. What are causes? (Multiple Choice)
A - RSTP defines the edge port role. The edge port does not receive and process configuration BPDUs, and
does not participate in RSTP calculation. The edge port can directly change from disabled state to forwarding state.
B - When the root port fails, the optimal alternate port will become the root port and enter the forwarding state.
C - In RSTP, when a port is elected as the designated port, it enters the discarding state. Then the port immediately enters the forwarding state through the proposal /agreement mechanism.
D - In RSTP, when a port receives RST BPDU’s form the upstream designated bridge , the port will compare the
own stored RST BPDU with the received RST BPDU’s
E - When the designated port fails, the optimal alternate port will become the root port and enter the forwarding state.
A B C D
Only MD5 authentication is supported between BGP peers.
A - TURE
B - FALSE
True
A DHCP server allocates IP addresses to clients. Which of the following steps are required when configuring a
DHCP server.
A - Enable DHCP globally
B - Configure the DHCP option 82 field
C - Configure the globally address pool if the DHCP server based on the global address pool is used.
D - Configure the interface address pool if the DHCP server based on the interface address pool is used.
A C D
RSTP is different from STP regarding defining port states. Which port states does RSTP define? A - Discarding B - Learning C - Forwarding D - Discarding Learning and Forwarding
D
Which are lower-layer physical devices of NFV framework? (Multiple Choice) A - Storage device B - Network device C - Server D - Air conditioning system
A B C
Which of the following statements regarding P2MP network is true? (Multiple Choice)
A - In a P2MP network, devices with different mask lengths cannot establish neighbor relationships but this
limitation can be overcome using the ospf p2mp-mask-ignore command.
B - In a P2MP network, DR and BDR need to be elected.
C - OSPF does not regard a network as a P2MP network type by default regardless of any link layer protocol. A P2MP network must forcibly changed from the network of other type.
D - ln a P2MP network, sent LSAs can be filtered using the filter-ls a-out peer command
A C D
In a route-policy, which of the following BGP attributes can be used in apply clauses? (multiple choice) A - local-Preference B - Tag C - MED D - AS. Path
A C D
If some devices on a network run MPLS (MPLS domain is encapsulated in the IP domain), labels are generated only for direct routes of devices running MPLS. Labels are not generated for the routes originated from other devices in the IP domain.
A - TRUE
B - FALSE
True
An attacker sends ICMP Request packets with the destination address as the broadcast address of the attacked user host. What is this attack? A - IP spoofing attack B - Smurf attack C - ICMP redirection attack D - SYN Flood attack
B
What is the default priority of the device in a VRRP group? A - 200 B - 150 C - 100 D - 0
C
Congestion management technology defines scheduling policies to determine the order of packet processing
A - TRUE
B - FALSE
True
Which problems of the single spanning tree network can be solved by MSTP?
A - Some VLAN paths are unreachable
B - Traffic cannot be load balanced.
C - The secondary optimal path is selected
D - Improve the network reliability
A B C
Which of the following statements regarding MUX VLAN is true?
A - You do not need to configure the principal VLAN and subordinate VLAN in sequence
B - The MUX VLAN function must be enabled on an interface so that it can take effect
C - The principal VLAN and the subordinate VLAN of the MUX VLAN can be the same VLAN
D - The MUX VLAN can contain only one subordinate group VLAN
B
On the DiffServ network, what is the main purpose of defining the service type of the EF classification?
A - Preferentially guarantee the services that require short delay, low packet loss, low jitter, and assured bandwidth.
B - Provide channels for packet forwarding
C - Ensure bandwidth for specific traffic
D - Ensure that packets are forwarded with the minimum delay
A
Which of the following statements regarding the OSPF protocol are true? (Multiple Choice)
A - An OSPF topology has three endpoint types: router node, stub network segment, and transit network
segment
B - A broadcast network segment or a NBMA network segment with at least two routers are a type of transit
network segment
C - The default bandwidth reference value of OSPF is 100 Mbit/s
D - The cost from a transit network segment to the router connected to this network segment is 100
A B C
Which of the following LSPs are established in Downstream Unsolicited (DU) label advertisement mode and ordered label distribution control mode? (Multiple Choice)
A - When the edge node finds a new destination address in its routing table that does not belong to any
existing FEC the edge bode not create a new FEC for destination address.
B - An LSP is established by binding an FEC to a label and advertising the binding relationship to the neighboring LSR
C - If the egress node has available labels for distribution, it allocates labels for the FEC and sends a label mapping message to the upstream node
D - After receiving a label mapping message the LSR adds the corresponding entry to the label forwarding
table
B C D
During configuration of the WRED drop profile, the lower drop threshold and upper drop threshold for AF21
traffic are 35 and 90, the lower drop threshold and upper drop threshold for AF22 traffic are 30 and 90. and the lower drop threshold and upper drop threshold for AF23 traffic are 25 and 90. The maximum drop probability for AF21, AF22 and AF23 traffic is 10%. Before congestion occurs, which type of traffic can obtain bandwidth guarantee?
A - AF21
B - AF22
C - AF23
D - AF21 AF22 and AF23 traffic
A
MUX VLAN provides a mechanism for network resource control based on VLANs. Which of the following concepts do not belong to the MUX VLAN? A - Principal VLAN B - Subordinate VLAN C - Guest VLAN D - Subordinate group VLAN
C
Which of the following aspects should be considered during preliminary analysis of a migration project ? A - Necessity B - Feasibility C - Risks D - Costs
A B C
Which of the following statements regarding huawei network optimization service (NOS) is false?
A - Life cycle assessment ( LAC ) is a technique to check and analyze the software and hardware life cycles of devices on the live network. With LCA, specific measures are taken for products that will reach the end of sales, production, software update, or technical support, preventing life cycle-caused operation risks.
B - Software assessment & recommendation is a technique to assess and analyze all software platforms used by party A in the service period. Based on the assessment result, this service can recommend a proper software version to prevent issues caused by know issues.
C - Configuration assessment & optimization is a Technique to develop and periodically maintain device
configuration profiles based on customer requirements. Based on the periodic software assessment & recommendation result, this service applies related software features to command lines in the recommended target version, implementing refined configuration management.
D - Network health check enables Huawei technology experts to review the rationality, security and scalability of the network architecture based on industry-leading optimal experience, and to provide improvement suggestions based on the assessment result.
D
Which of the following commands can display OSPF neighbor status information? A - Display ospf peer B - Display ip ospf peer C - Display ospf neighbor D - Display ip ospf neighbor
A
To avoid global TCP synchronization, which congestion avoidance mechanisms can be used? A - RED B - WRED C - Tail Drop D - WFQ
A B
When BFD detection intervals at both ends are 30ms and 40ms, Which of the following statement is true?
A - A BFD session can be set up. After the negotiation, the detection interval of 90ms is used.
B - A BFD session can be set up. After the negotiation, the detection interval of 30ms is used.
C - A BFD session can be set up. And packets are sent at respective interval at both ends.
D - A BFD session cannot be established
A
Which of the following statements regarding EGP and IGP is false?
A - IGP runs within an AS
B - EGP runs between AS’s
C - IGP focuses on controlling route advertisement and optimal route selection
D - EGP itself is an old protocol
C
Which application environment of following is NFV often deployed? A - Data Center B - Network node C - User access side D - Client/Server
A B C
Which of the following commands can display OSPF neighbor information on the VRP platform? A - Display ospf peer B - Display ospf interface C - Display ospf Isdb D - Display ospf routing
A B
ASFF enables the firewall to support multi-channel protocols such as FTP and to define security policies for
complex applications
A - TRUE
B - FALSE
A
Which of the following OSPF neighbor states occurs only on NBMA network? A - Down B - Init C - Attempt D - 2-way
C
Which of the following parameters is optional when you configure a RADIUS server template on a Huawei switch?
A - Authentication server IP address and port
B - Automatic RADIUS user detection
C - Accounting server address and port
D - Shared-key
B
Which of the following statements regarding a multicast distribution tree is false?
A - There are two types of multicast distribution trees SPT and RPT
B - The PIM-SM protocol can generate both RPT trees and SPT tress
C - The P1M-DM protocol can generate both RPT trees and SPT trees
D - The PIM-DM protocol can generate only SPT trees
C
An AS boundary router can be an internal router or ABR and must belong to the backbone area
A - TRUE
B - FALSE
False
In an IS-IS broadcast network, which multicast MAC address is used by a Level-2 router as the destination address of sent IS-IS Hello packets? A - 0180-C200-0014 B - 0180-C200-0016 C - 0180-C200-0015 D - 0100-5E00-0002
C
An LSR supports various label retention modes. Which of the following statements regarding the liberal mode
are true? (Multiple Choice)
A - An LSR reserves all label sent by its neighbor
B - The liberal mode requires more memory and label space
C - An LSR retains labels from a neighboring LSR only when the neighbor is its next hop
D - This label retention mode saves the memory and label space.
E - This label retention mode reduces the LSP convergence time when the IP routes converge and the next hop changes
A B E
