單項(xiàng)選擇題3DES使用的是()

A.加密—加密—解密
B.加密—解密—加密
C.解密—加密—解密
D.加密—加密—加密


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1.單項(xiàng)選擇題Which command can be a router to verify the layer 3 path to a host?()

A.traceroute address
B.tracert address
C.ssh address
D.telnet address

3.多項(xiàng)選擇題選擇加密算法時(shí)應(yīng)該考慮的標(biāo)準(zhǔn)為()

A.算法是受到密碼界社團(tuán)信任的
B.算法能夠充分抵抗強(qiáng)力攻擊
C.算法支持可變的和長(zhǎng)的密鑰長(zhǎng)度以及擴(kuò)展性
D.算法有沒有出口和進(jìn)口限制

4.單項(xiàng)選擇題What is one benefit of PVST+?()

A.PVST+reduces the CPU cycles for all the switches in the network
B.PVST+automatically selects the root bridge location,to provide optimiz…
C.PVST+allow the root switch location to be optimized per vlan.
D.PVST+supports Layer 3 load balancing without loops.

5.多項(xiàng)選擇題Which two are advantages of static routing when compared to dynamic routing?()

A.Security increases because only the network administrator may change the routing tables.
B.Configuration complexity decreases as network size increases.
C.Routing updates are automatically sent to neighbors.
D.Route summarization iscompued automatically by the router.
E.Routing traffic load is reduced when used in stub network links
F.An efficient algorithm is used to build routing tables,using automatic updates.
G. Routing tables adapt automatically to topology changes.

6.多項(xiàng)選擇題下列算法中哪些是對(duì)稱密鑰算法()

A.DES
B.3DES
C.AES
D.SEAL

7.單項(xiàng)選擇題Which item represents the standard IP ACL?()

A.access-list 50 deny 192.168.1.1 0.0.0.255
B.access-list 110 permit ip any any
C.access-list 2500 deny tcp any host 192.168.1.1 eq 22
D.access-list 101 deny tcp any host 192.168.1.1

8.多項(xiàng)選擇題密鑰管理需要考慮()的基本特性

A.生成
B.驗(yàn)證
C.存儲(chǔ)
D.撤銷和銷毀

9.單項(xiàng)選擇題A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24/29.which statement explains the reason for this issue?()

A.The address is a broadcast address
B.The Ehernet interface is faulty
C.VLSM-capable routing protocols must be enable first on the router.
D.This address is a network address.

10.單項(xiàng)選擇題Which IPv6 address is valid?()

A.2031:0:130F::9C0:876A:130B
B.2001:0DB8:0000:130F:0000:0000:08G
C.140BC.2001:0DB8:0:130H::87C:140B
D.2031::130F::9C0:876A:130B

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