高级网络工程师招聘试题

高级网络工程师招聘试题 试题说明：本卷共有30道选择题，请在答题卡中对应填写每道试题的答案。 试题如下： A packet is destined for 172.16.1.1. Which of the following routes will be selected as the best path A. Default static route for 0.0.0.0/0 with administrative distance 1 B. RIP received route for 172.16.1.0/30 with administrative distance 120 C. BGP received route for 172.16.1.0/16 with administrative distance 20 D. OSPF received route for 172.16.1.0/28 with administrative distance 110 During the final stages of OSPF convergence, when can the OSPF router begin to send user data? A. Full B. Exchange C. 2-way D. Exstart E. Init F. Loading  what protocol transport does BGP use? A. BGP is connection-oriented using TCP B. BGP is connection-less using UDP C. BGP is connection-less using TCP D. BGP is connection-oriented using UDP  What is the inverted wildcard mask of /26? A. 192.255.255.255 B. 63.255.255.255 C. 0.0.0.192 D. 0.0.0.63  Which of the below correctly describe the BGP regular expression '^200_'? A. Match strings which include AS 200 B. Local AS only C. Match strings originating from AS 200 D. Match string received from AS 200  Which of the following is false regarding routers running internal BGP? A. They do not have to be directly connected B. Routers are running IBGP when two BGP speaking routers are in different AS's C. Routers are running IBGP when tow BGP speaking routers are in the same AS D. They must form a TCP port 179 connection with each other. Which ways can BGP discover neighbors? A. Broadcasts only B. During a BGP election C. Statically defined neighbors D. Explorer packets  How does a router forward a datagram to the next hop address? A. A router rewrites the MAC address of the datagram to correspond to the next hop. B. A router rewrites the IP address of the datagram to correspond to the next hop. C. A router rewrites the MAC and IP addresses of the datagram to correspond to the next hop D. A router simply forwards the datagram out the appropriate interface without rewriting. Which of the following BGP Attributes can be used to hint to external neighbors about the preferred path into an AS? A. MED B. Weight C. Next Hop D. Local Preference  Which of the following BGP rules states that "If your autonomous system is passing traffic from another AS to a third AS, BGP should not advertise a route before all routers in your AS have learned about the route via IGP". A. Synchronization B. Community C. Local Preference D. Aggreagtion  Which of the following is best described by a group of BGP neighbors configured with the same update policies? A. AS B. Confederation C. Community D. Peer Group  Which of the following limits the practical size of a LAN or VLAN? A. the speed of technologies to link networks in different buildings B. host performance in an environment with many broadcasts C. the address space of a subnet D. the number of ports on a switch Which of the following is true about VTP? If you enable VTP without specifying the mode, the switch will be VTP transparent. You may create VLANs on a VTP client, but they won't propagate to any oter switch. Adding a server to a domain with a high configuration revision number stored in non-volatile memory can alter or delete VLANs VTP version 1 and 2 switches can co-exist and interoperate within a network Spanning tree protocol puts a port in one of 5 states. Which of the following is true of the blocking state? A. No frames are forwarded. Learning Addresses. B. Frames are forwarded. Learning addresses. C. No frames are forwarded. No BPDU's are heard D. No frames are forwarded. BPDU's are heard Users complain that when they boot their desktop machines, it takes too long before the switched network provides connectivity. What should you do? A. Enable uplinkfast on user ports. B. Turn on backbonefast. C. Turn off spanning tree. D. Enable portfast on user ports.  What is NOT a valid cause of a bad quality of service? A. Too much variation in delay B. A router has gone down C.