單項(xiàng)選擇題What does qos pre-classify provides inregardto implementing QoS over GRE/IPSec VPN tunnels?()

A. enables IOS to copy the ToS field from the inner (original) IPheader to theouter tunnel IP header
B. enables IOS to make a copy of the inner (original) IP header and to run a QoS classification before encryption, based on fields in the inner IP header.
C. enables IOS to classify packets based on the ToS field in the inner (original) IP header
D. enables IOS to classify packets based on the ToS field in the outer tunnel IP header
E. enables the IOS classification engine to only see a single encrypted and tunneledflow to reduce classification complexity


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1.多項(xiàng)選擇題Asymmetric and symmetric ciphers differ in which of the following way(s)? () 

A.Asymmetric ciphers use pre-shared keys
B.Symmetric ciphers are faster to compute
C.Asymmetric ciphers are faster to compute
D.Asymmetric ciphers use public and private

2.單項(xiàng)選擇題Which of the following is the most effective technique to prevent source IPAddress spoofing?()

A. policy based routing (PBR)
B. unicast reverse path forwarding (uRPF)
C. lock and keyACL
D. RFC 1918filtering
E. IP source routing

3.單項(xiàng)選擇題Which type of attacks can be monitored and mitigated by CS-MARS using NetFlow data?()

A. Man-in-themiddle attack
B. Spoof attack
C. Land.C attack
D. Buffer Overflow
E. Day zero attack
F. Trojan Horse

4.單項(xiàng)選擇題Which best represents a typical attackthat takes advantage of RFC 792, ICMPType 3 messages?()

A. Blind connection-reset
B. Large packet echo request
C. Packet fragmentation offset
D. Broadcast-based echo request
E. Excessive bandwidth consumption

5.多項(xiàng)選擇題Cisco IOS IPS sends IPS alert messages using which two protocols? ()

A. SDEE
B. LDAP
C. SYSLOG
D. FTP
E. SNMP
F. SMTP

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