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H3C Constructing Secure optimized WANs v2.0 Sample Questions:

1. The VPI/VCI parameters of ADSL connection are negotiated and determined in ____ .

A) Jian Li low-level link VCC
B) PPPoE negotiation
C) Line Road activate
D) DMT modulation

2. The correct statement regarding the defense of malformed messages is ______ .

A) abnormal shaped packet attacks targeted defense needs for each attack
B) needle deformity TCP packet attack, by determining TCP determines whether the packet is a packet attack packet flag for .6 flag bits are all 1 or .6 flag bits are all is 0 or SN and FIN simultaneously It is a packet discards
C) needle for Teardrop , information may be cached fragment attack by class, each source, the purpose of the IP , the packet ID the same set of configuration, the maximum cache 10,000 groups , the data in the buffer reaches a maximum when directly discards fragmented, while According to the cached fragmentation information, analyze the legitimacy of IP packet segmentation, and directly discard illegal IP packets to resist attacks
D) needles of ping of death attacks by detecting sensing Ping whether the request packet over a length of over 65536 bytes to discriminate whether the attack packets, if the length exceeds 65536 bytes, the packet will be discarded.

3. The following commands are configured on the S3610 switch:
qos map-table dot1p-lp
import 1 export 5
import 2 export 4
interface Ethernet1/0/8
port link-mode bridge
port link-tpe trunk
port trunk permit vlan 1 4
qos trust dot1p
interface Ethernet1/0/9
port link-mode bridge
port link-tpe trunk
port trunk permit vlan 1 4
qos gts an cir 65000 cbs 2000000
When the flow rate of 40Mbps is vlan id is 4 and the 802.1p priority to 1 of packets, and a flow rate of 40Mbps is vlan id is 4 and the 802.1p priority 2 packets simultaneously from the end of the port E1 / 0/8 enters , from the side port E1 / 0/9 forwarding when made, the right is ______ ( one or more )

A) portions partial misconfigured
B) 802.1p preferred precedence 2 packets at the end of the outlet E1 / 0/9 packet loss
C) 80Mbps packets are forwarded normally
D) 802.1p preferably precedence 1 packets at the end of the outlet E1 / 0/9 Forward all
E) 802.1p preferred precedence 2 packets at the end of the outlet E1 / 0/9 Forward all
F) Packet traffic shaping is 65kbps for forwarding

4. The configuration commands on the MSR router are as follows:
acl number 2001
rule 0 permit source 192.168.2.0 0.0.0.2
acl number 2002
rule 0 permit source 192.168.3.0 0.0.0.2
acl number 2003
rule 0 permit source 192.168.0.0 0.0.0.2
#
traffic classifier 2 operator or
if-match acl 2001
if-match acl 2002
if-match acl 2003
#
traffic behavior 2
filter den
#
qos polic 2
classifier 2 behavior 2
#
interface GigabitEthernet0/1
port link-mode route
ip address 192.168.1.1 255.255.255.0
qos appl polic 2 outbound
Then when the source address are 192.168.2.2 , 192.168.3.2.1 , 92.168.0.2 the packets from the port G0 / 1 forwarding outwardly, the following statement is correct ______

A) Forwarding of packets whose source address is 192.168.2.2 is blocked
B) Packets with the source address of 192.168.2.2 are forwarded normally
C) Packets with the source address of 192.168.0.2 are forwarded normally
D) three message by the flow are blocked

5. Regarding the echo in the VoIP telephone system, which of the following descriptions are wrong ?

A) back sound into electrical echo and acoustic echo, electrical echo conventional telephone systems is mainly due to two, four-wire transducer impedance mismatch caused by
B) speech voice gateway device when performing analog to digital conversion may introduce echo, an echo suppression function but can be configured to reduce the impact on the voice gateway.
C) language voice gateway equipment itself does not bring new echo, but the IP network to bring network latency, increasing the echo time delay, leading to the original feel of the echo in VoIP become energy network The echo of being felt.
D) In VoIP networks, echo is related to the choice of encoding.The greater the compression ratio, the greater the relative echo in the network.

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