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NEW QUESTION: 1
Which protocol provides port-based access control and authentication?
A. 802.1Q
B. 802.1P
C. 802.1X
D. 802.1W
Answer: C
Explanation:
Explanation/Reference:
Explanation:
IEEE 802.1X provides port-based access control and authentication.
IEEE 802.1X is a client-server based access control model. If IEEE 802.1X is enabled on a switch
interface, the interface is in an unauthorized state until it is authenticated. Until the station is authenticated,
the only protocols allowed through switch ports are:
CDP
STP
EAP-over-LAN (EAPOL is the only type of traffic accepted from a station)
The supplicant PAE sends EAPOL packets that indicate its request for access through the switch to the
LAN. The switch performs the authenticator role by processing the EAPOL packets from the port-attached
supplicant PAE and forwarding an authentication request to the authentication server. The only supported
authentication server is a Remote Access Dial-In User Server (RADIUS) server with EAP extensions. The
authentication server checks the identity of the client (the supplicant PAE) and will either accept or reject
the request. If the server accepts the request, the port is authorized and the switch will send and receive all
frames. If it fails, only EAPOL packets will continue to be processed. Once the client is finished with the
connection, an EAPOL logoff is issued, and the switch port once again becomes unauthorized.
Below is a sample configuration to enable 802.1X authentication and enable it on an interface:
switch(config)# aaa new-model
switch(config)# aaa authentication dot1x default group radius
switch(config)# dot1x system-auth-control
switch(config-if)# dot1x port-control auto
802.1w is the standard for Rapid Spanning Tree Protocol (RSTP). It is not related to port-based access
control and authentication.
802.1P is a method for assigning priority to packets traversing a network. It is not related to port-based
access control and authentication.
802.1Q describes VLAN tagging. It is not related to port-based access control and authentication.
Objective:
Infrastructure Security
Sub-Objective:
Describe device security using Cisco IOS AAA with TACACS+ and RADIUS
References:
Cisco > Catalyst 4500 Series Switch Cisco IOS Command Reference, 12.2(52)SG > aaa accounting dot1x
default start-stop group radius through instance > aaa accounting dot1x default start-stop group radius
Cisco > Catalyst 4500 Series Switch Cisco IOS Command Reference, 12.2(52)SG > aaa accounting dot1x
default start-stop group radius through instance > dot1x port-control
Cisco > Catalyst 4500 Series Switch Cisco IOS Command Reference, 12.2(52)SG > aaa accounting dot1x
default start-stop group radius through instance > dot1x system-auth-control
Cisco > Cisco IOS Security Command Reference > aaa new-model

NEW QUESTION: 2
WLANウィザードで選択できる認証サーバーのタイプは何ですか？ （3つ選択してください）：
A. RADIUS
B. Kerberos
C. 内部データベース
D. LDAP
E. Tacacs
Answer: A,C,D

NEW QUESTION: 3
You are looking at ways to improve some existing infrastructure as it seems a lot of engineering resources are being taken up with basic management and monitoring tasks and the costs seem to be excessive.
You are thinking of deploying Amazon ElasticCache to help. Which of the following statements is true in regards to ElasticCache?
A. You can't improve load and response times to user actions and queries but you can reduce the cost associated with scaling web applications.
B. You can improve load and response times to user actions and queries however the cost associated with scaling web applications will be more.
C. You can improve load and response times to user actions and queries however the cost associated with scaling web applications will remain the same.
D. You can improve load and response times to user actions and queries and also reduce the cost associated with scaling web applications.
Answer: D
Explanation:
Amazon ElastiCache is a web service that makes it easy to deploy and run Memcached or Redis protocol-compliant server nodes in the cloud. Amazon ElastiCache improves the performance of web applications by allowing you to retrieve information from a fast, managed, in-memory caching system, instead of relying entirely on slower disk-based databases. The service simplifies and offloads the management, monitoring and operation of in-memory cache environments, enabling your engineering resources to focus on developing applications.
Using Amazon ElastiCache, you can not only improve load and response times to user actions and queries, but also reduce the cost associated with scaling web applications.
Reference: https://aws.amazon.com/elasticache/faqs/