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2021 Nov ccie 400 101:

Q311. Which command sets the maximum segment size for a TCP packet initiated from a router? 

A. ip mtu 

B. ip tcp adjust-mss 

C. ip tcp mss 

D. ip tcp window-size 

Answer: C 


Q312. What is the destination address of an IGMPv2 general membership query? 

A. 224.0.0.1 

B. 224.0.1.1 

C. 224.0.0.2 

D. the multicast group address 

Answer: A 


Q313. Refer to the exhibit. 

For which reason could a BGP-speaking device in autonomous system 65534 be prevented from installing the given route in its BGP table? 

A. The AS number of the BGP is specified in the given AS_PATH. 

B. The origin of the given route is unknown. 

C. BGP is designed only for publicly routed addresses. 

D. The AS_PATH for the specified prefix exceeds the maximum number of ASs allowed. 

E. BGP does not allow the AS number 65535. 

Answer: A 

Explanation: 

BGP is considered to be a 'Path Vector' routing protocol rather than a distance vector routing protocol since it utilises a list of AS numbers to describe the path that a packet should take. This list is called the AS_PATH. Loops are prevented because if a BGP speaking router sees it's own AS in the AS_PATH of a route it rejects the route. 


Q314. DRAG DROP 

Drag and drop Layer 2 QoS Commands on the left to the corresponding functions on the right. 

Answer: 


Q315. Which two statements about private VLANs are true? (Choose two.) 

A. Only one isolated VLAN can be mapped to a primary VLAN. 

B. Only one community VLAN can be mapped to a primary VLAN. 

C. Multiple isolated VLANs can be mapped to a primary VLAN. 

D. Multiple community VLANs can be mapped to a primary VLAN. 

Answer: A,D 

Explanation: 

An isolated VLAN is a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports. You can configure only one isolated VLAN in a PVLAN domain. An isolated VLAN can have several isolated ports. The traffic from each isolated port also remains completely separate. Only one isolated VLAN can be mapped under a given primary VLAN. A community VLAN is a secondary VLAN that carries upstream traffic from the community ports to the promiscuous port and to other host ports in the same community. You can configure multiple community VLANs in a PVLAN domain. The ports within one community can communicate, but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN. 

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus6000/sw/layer2/6x/b_6k_L ayer2_Config_6x/b_6k_Layer2_Config_602N12_chapter_011.html 


Regenerate ccie dumps 400-101:

Q316. Which three benefits does the Cisco Easy Virtual Network provide to an enterprise network? 

(Choose three.) 

A. simplified Layer 3 network virtualization 

B. improved shared services support 

C. enhanced management, troubleshooting, and usability 

D. reduced configuration and deployment time for dot1q trunking 

E. increased network performance and throughput 

F. decreased BGP neighbor configurations 

Answer: A,B,C 


Q317. Which two operating modes does VPLS support? (Choose two.) 

A. transport mode 

B. strict mode 

C. port mode 

D. loose mode 

E. VLAN mode 

F. dynamic mode 

Answer: C,E 


Q318. Which two statements about SNMP traps are true? (Choose two.) 

A. They are sent by an agent after a specified event. 

B. They are sent when solicited after a specified event. 

C. They are equivalent to a community string. 

D. They provide solicited data to the manager. 

E. They are sent by a management station to an agent. 

F. Vendor-specific traps can be configured. 

Answer: A,F 

Explanation: 

The SNMP agent contains MIB variables whose values the SNMP manager can request or change. A manager can get a value from an agent or store a value into the agent. The agent gathers data from the MIB, the repository for information about device parameters and network data. The agent can also respond to a manager's requests to get or set data. An agent can send unsolicited traps to the manager. Traps are messages alerting the SNMP manager to a condition on the network. Traps can mean improper user authentication, restarts, link status (up or down), MAC address tracking, closing of a TCP connection, loss of connection to a neighbor, or other significant events. 

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/configuration/guide/scg_2960/swsnmp.html 


Q319. Which two parameters does the Tunnel Mode Auto Selection feature select automatically? (Choose two.) 

A. the tunneling protocol 

B. the transport protocol 

C. the ISAKMP profile 

D. the transform-set 

E. the tunnel peer 

Answer: A,B 

Explanation: 

The Tunnel Mode Auto Selection feature eases the configuration and spares you about knowing the responder’s details. This feature automatically applies the tunneling protocol (GRE or IPsec) and transport protocol (IPv4 or IPv6) on the virtual template as soon as the IKE profile creates the virtual access interface. This feature is useful on dual stack hubs aggregating multivendor remote access, such as Cisco AnyConnect VPN Client, Microsoft Windows7 Client, and so on. 

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_conn_vpnips/configuration/xe-3s/sec-sec-for-vpns-w-ipsec-xe-3s-book/sec-ipsec-virt-tunnl.html 


Q320. Refer to the exhibit. 

Switch DSW1 should share the same MST region with switch DSW2. Which statement is true? 

A. Configure DSW1 with the same version number, and VLAN-to-instance mapping as shown on DSW2. 

B. Configure DSW1 with the same region name, number, and VLAN-to-instance mapping as shown on DSW2. 

C. DSW2 uses the VTP server mode to automatically propagate the MST configuration to DSW1. 

D. DSW1 is in VTP client mode with a lower configuration revision number, therefore, it automatically inherits MST configuration from DSW2. 

E. DSW1 automatically inherits MST configuration from DSW2 because they have the same domain name. 

Answer: B